Solve the Problem $\$ 20$ Toy B Requires 20 Minutes to Assemble, 12 Minutes

Solve the problem.
-A toy manufacturer makes three types of toys. Toy A requires 12 minutes to assemble, 12 minutes to paint, 4 minutes to package, and sells for $\$ 20$ . Toy B requires 20 minutes to assemble, 12 minutes to paint, 8 minutes to package, and sells for $\$ 25$ . Toy $\mathrm{C}$ requires 24 minutes to assemble, 20 minutes to paint, 16 minutes to package, and sells for $\$ 30$ . The manufacturer has available 800 work-minutes for assembly, 600 work-minutes for painting, and 720 work-minutes for packaging each day. They must make at least 10 toys of type A and 15 of type $B$ each day. How many of each type of toy should be produced each day to maximize revenues?

A) 6 of Toy A, 10 of Toy B, 20 of Toy C
B) 21 of Toy A, 20 of Toy B, 5 of Toy C
C) 25 of Toy A, 25 of Toy B, 0 of Toy C
D) 20 of Toy A, 20 of Toy B, 6 of Toy C