Target units offered for sale to very low, low, or moderate income households in condominiums and planned developments shall be sold at an affordable ownership cost. The maximum resale price shall be the lower of: (1) fair market value or (2) the seller's initial purchase price, increased by the lesser of (A) the rate of increase of area median income during the seller's ownership or (B) the rate at which the consumer price index increased during the seller's ownership. The seller of the unit shall retain the market value at the time of sale of any capital improvements made by the seller, the down payment, and the seller's proportionate share of appreciation. Because this subsection limits the seller's appreciation, the seller's proportionate share of appreciation is one hundred (100%) percent.