The estimated stand-alone selling price of the software, using the expected cost plus margin method, is computed as follows: $65 + (50% of $65) = $65 + $32.50 = $97.50.
Matthew is experiencing post-purchase dissonance, often referred to as buyer's remorse. This feeling encompasses regret after a purchase, which frequently occurs after acquiring expensive items like real estate. The regret typically arises from the investment made, the involvement of the buyer, and the internal conflict regarding whether the purchase aligns with their objectives. In Matthew's case, this feeling might stem from the relatively low cost of the item purchased, coupled with concerns about the ethicality of the acquisition.