Answer
Fried Chicken 96 pieces
Lasagna 33.6 pounds
Deli Meats 10.8 pounds
Sliced Cheese 5.6 pounds
Bakery Buns 7.2 dozen
Potato Salad 14.4 pounds
Work Step by Step
Fried Chicken $\frac{40\ pieces}{25\ people}\times60\ people$ = 96 pieces
Lasagna $\frac{14\ pounds}{25\ people}\times60\ people$ = 33.6 pounds
Deli Meats $\frac{4.5\ pounds}{25\ people}\times60\ people$ = 10.8 pounds
Sliced Cheese $\frac{2\frac{1}{3} pounds}{25\ people}\times60\ people$ = $\frac{\frac{7}{3} pounds}{25\ people}\times60\ people$ = $\frac{7}{3} pounds\times\frac{1}{25\ people}\times60\ people$ = $\frac{420}{75}\ pounds$ = 5.6 pounds
Bakery Buns $\frac{3\ dozen}{25\ people}\times60\ people$ = 7.2 dozen
Potato Salad $\frac{6\ pounds}{25\ people}\times60\ people$ = 14.4 pounds