Adeli sells two types of sandwiches, tuna salad and blt. the profit on the sandwiches is $1.50 for tuna and $2.50 for the blt. the amount of bread available is enough for 30 sandwiches. the deli has 4 hours available to prepare sandwiches in the morning. if tuna sandwiches take 6 minutes to prepare, and blt sandwiches take 9 minutes, how many of each type of sandwich should be prepared to maximize the profit? a. 10 tuna salad 20 blt c. 18 tuna salad 12 blt b. 15 tuna salad 15 blt d. 20 tuna salad 10 blt