Ariz. Rev. Stat. § 47-9103
A. In this section:
B. A security interest in goods is a purchase money security interest:
C. A security interest in software is a purchase money security interest to the extent that the security interest also secures a purchase money obligation incurred with respect to goods in which the secured party holds or held a purchase money security interest if:
E. In a transaction other than a consumer goods transaction, if the extent to which a security interest is a purchase money security interest depends on the application of a payment to a particular obligation, the payment must be applied:
3. In the absence of an agreement to a reasonable method and a timely manifestation of the obligor's intention, in the following order:
F. In a transaction other than a consumer goods transaction, a purchase money security interest does not lose its status as such, even if: