ZapOne Inc., a toy$-$manufacturing company, has manufactured a toy car that costs $$15.$ Suan, the retailer for the toy car, wishes to make a profit of $21\mathrm{.}0\%.$ Which of the following should be the toy car's retail price?$$315\mathrm{.}00$$$75\mathrm{.}00$$$18\mathrm{.}99$$$300\mathrm{.}00$$$3\mathrm{.}15.$