[¶ 1.] Ezra Pauley and Elizabeth J. Pauley (Pauley) leased agricultural property to Mark J. Simonson and Mira M. Si-monson (Simonson). The lease included an option to purchase the property. When Simonson failed to make a lease payment, Pauley filed an action for forcible entry and detainer. After the circuit court determined that the disputed payment was required and that the lease was breached and terminated, both parties moved for summary judgment to determine whether the option to purchase survived. The circuit court concluded that the option to purchase was not severable, and therefore, the option did not survive the termination of the lease. Simonson appeals. We affirm.
Facts and Procedural History
[¶ 2.] Pauley owned agricultural land in Butte County, South Dakota. After expressing an interest in leasing the land, Simonson prepared a lease agreement and presented it to Pauley. The parties subsequently negotiated further terms of the agreement. The final agreement provided that Simonson would lease the land for $36,000 for the first year. Simonson was to pay Pauley $6,000 upon execution of the lease and make $10,000 payments on July 4, 2002, October 4, 2002, and January 4, 2003. After the first year, the annual lease was $40,000, and Simonson was required to make quarterly payments of $10,000 on January 4, April 4, July 4, and October 4 of each year. The lease was set to expire ninety days upon the last to die of Ezra and Elizabeth Pauley, unless it terminated under the terms of the agreement.
[¶ 3.] The final agreement also contained an option provision. The provision gave Simonson the option to purchase the property upon the last to die of Ezra and Elizabeth Pauley. The provision further provided that Simonson was to make a $4,000 nonrefundable payment for the option at the time the lease was executed.
*667 [¶ 4.] Upon execution of the lease, Si-monson paid the first lease payment of $6,000 and, with a separate check, paid the $4,000 option payment. Simonson also made the three remaining $10,000 payments for the first year of the lease. However, Simonson failed to make the $10,000 payment on January 4 for the second year. 1 Pursuant to Section XXIII of the lease, Pauley notified Simonson that he intended to terminate the lease for failing to make the payment. 2 Pauley also filed the forcible entry and detainer action.
[¶ 5.] Following the forcible entry and detainer proceeding, the circuit court concluded that Simonson failed to make the $10,000 payment on January 4 for the second year of the lease, and the lease was terminated. Thereafter, both sides moved for summary judgment to determine whether the option to purchase was a separate and distinct contract that survived the termination of the lease.
[¶ 6.] Following a hearing on these motions, the circuit court concluded that the option to purchase was not severable from the lease, and therefore, the option did not survive the termination of the lease. 3 This is the sole issue on appeal.
Decision
[¶ 7.] “Summary judgment is authorized ‘if the pleadings, depositions, answers to interrogatories, and admissions on file, together with the affidavits, if any, show that there is no genuine issue as to any material fact and that the moving party is entitled to judgment as a matter of law.’ ”
Krier v. Dell Rapids Twp.,
[¶ 8.] The interpretation of a contract is a question of law.
Ziegler Furniture and Funeral Home, Inc. v. Cicmanec,
[¶ 9.] The parties agree that there are no genuine issues of material fact in dispute; therefore, this Court need only determine whether the circuit court correctly applied the law in concluding that the option was not severable from the lease. In
Commercial Trust & Sav. Bank v. Christensen,
[¶ 10.] The circuit court concluded that the $4,000 consideration was not an agreed equivalent for the option. After analyzing a previous draft of the lease, the court concluded that there was “no equivalent value because the parties merely carved out the option payment from the annual lease payment.” Thus, the circuit court concluded that the $4,000 payment for the option was merely form over substance because it was, in reality, a part of the first quarterly lease payment. We agree.
[¶ 11.] Pauley and Simonson’s agreement does not address their intention regarding termination of the option upon default and termination of the lease. Section XXIII, which contains the landlord’s remedies upon default, merely provides that: “Landlord, either before or after reentry, may notify Tenant, if Tenant can be located, that he elects to terminate this Lease.” (Emphasis added.) However, the other terms of the agreement do not reveal whether “this Lease” meant the entire agreement, including the lease and the option, or just the lease. Thus, we turn to extrinsic evidence to clarify this ambiguity.
[¶ 12.] The record indicates that Si-monson sent Pauley an outline of a proposed lease agreement on February 5, 2002. This proposal, which was drafted by Simonson, provided that the annual lease would be $40,000. However, on March 13, 2002, Simonson sent Pauley a more formal *669 second draft of the lease. This draft reduced the annual payment for the first year by $4,000 and added the provision that gave Simonson the option to purchase the property for $4,000. Simonson also sent Pauley a note with the second draft, which stated:
One important point: he made the first $10,000 payment split into a $6,000 lease payment plus a $4,000 option-to-purchase payment. He did this to ensure that my option to purchase will stand the test of time; otherwise, the executor of your estate would not be obligated to honor our agreement.
The drafts and this note reflect that although the parties intended to make the option binding on Pauley’s estate, the consideration for the option was merely a reallocation of the first quarterly lease payment. Considering the prior drafts as well as Simonson’s note, we agree with the circuit court that this did not evince equivalent value for both parts of the agreement, i.e., the consideration for the option was merely a part of the first quarterly lease payment.
[¶ 13.] Our decision today is supported by our holding in
Commercial Trust.
In that case, farm land was leased for a ten year period, and the agreement contained an option to purchase the property.
Commercial Trust,
[¶ 14.] Similarly, in
Mattson v. Rachetto,
[¶ 15.] This case is similar to Commercial Trust and Mattson because there was *670 no separate consideration for the option to purchase the land. Rather, the two drafts and Simonson’s note reveal that the parties intended to enter into an agreement to lease the land for $40,000 per year and that the $4,000 option price was merely a part of the first quarterly lease payment. Because there was no separate consideration for the option, there were no agreed equivalents for the parts of each pair of part performances. Therefore, the preliminary requirements set forth in Commercial Trust are not satisfied, and the option to purchase cannot be severed from the invalidated lease.
[¶ 16.] Affirmed.
Notes
. Simonson made one payment of $10,000 on January 4, 2003. However, the trial court concluded that under Section IV of the lease, Simonson was required to make two payments of $10,000. Section IV provided:
For the first year of this Lease, the rent shall be Thirty-six Thousand Dollars ($36,-000) with the payments to be as follows: Six Thousand Dollars ($6,000) upon the date of execution of this Lease; Ten Thousand Dollars ($10,000) on July 4, 2002; Ten Thousand Dollars ($10,000) on October 4, 2002; and Ten Thousand Dollars ($10,000) on January 4, 2003.
After the first year of this Lease, the annual rental shall be Forty Thousand Dollars ($40,000) per year, paid in Ten Thousand Dollar ($10,000) quarterly installments due and payable on January 4, April 4, July 4, and October 4 of each year.
(Emphasis added.)
. Section XXIII provides:
In the event Tenant should be in default of the performance of any terms, covenants or conditions of this Lease, Landlord may, in addition to every remedy now or hereafter available at law or in equity, have the rights and remedies herein set forth and the same shall be deemed cumulative and not exclusive of those available at law or in equily. Upon default Landlord shall have the right to re-enter the premises. Landlord, either before or after re-entry, may notify Tenant, if Tenant can be located, that he elects to terminate this Lease. Upon default Landlord shall have the right to take possession of all crops, both harvested and unharvested, the right to remove all property and persons from the leased premises, and the right to store in public warehouse at Tenant’s expense all property so removed.
.A third trial was later held regarding damages.
. SDCL 43-32-2 states, in pertinent part:
No lease or grant of agricultural land for a longer period than twenty years, in which shall be reserved any rent or service of any kind, shall be valid.
. The agreement provided:
1) For and in consideration of the sum of Twenty-six Thousand Nine Hundred Fifty-nine Dollars and Fifty Cents ($26,959.50), [Sellers] agree to convey by Warranty Deed to [Purchasers] [Tract C]:
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2) For and in consideration of the agreement by [Sellers] to sell the above-described property to [Purchasers], [Purchasers] hereby lease to [Sellers] the above-described property.
Mattson,