Patterson Hotdogs and Grill normally sells hotdogs for $$2\mathrm{.}00$ but also sells $t-$shirts with the name of the business and its logo prominently displayed for $$10.$ The $t-$shirts haven't been selling that well lately, so Patterson has decided to a combination of the t$-$shirt for $$10$ with a free hot dog. Donovan buys the combination of the $t-$shirt and hot dog for $$10$ in cash. How should Patterson account for the transaction? $($Hint: Allocate based on standalone selling price$).$