HELP ME OUT PLEASE!!!!!!

The total cost, c, varies directly with the number of boxes of chocolates, n, bought. If 3 boxes of chocolates cost $9.75, how much would 8 boxes of chocolates cost.​

HELP ME OUT PLEASE The total cost c varies directly with the number of boxes of chocolates n bought If 3 boxes of chocolates cost 975 how much would 8 boxes of class=