Cal. Health & Safety Code § 1788.2
(c) The cancellation period and the associated refund obligations shall apply as follows:
(d) The following fees may be charged before or during the 90-day cancellation period:
(e) No resale fee shall exceed the sum of 10 percent of either the original or resale price of the equity interest and 100 percent of the excess if any, of the gross resale price of the equity interest over the purchase price paid by the resident or on behalf of the resident for the interest if either of the following applies: