A: 8: 10

B: 9: 12

C: 7: 1 1

Chapter VI Section 7

So I let Ding go out for 7 days: 6 * 7 = 42.

C produces 7-day pants: 7 * 1 1 = 77.

Because coat production is slow, so

A also produces 7 zenith: 8 * 7 = 56.

Set b to produce x-day coating:

42+56+X*9=77+ 12*(7-X)

X=3

So the maximum yield: 42+56+3 * 9 = 125.

77+ 12*4= 125

I don't know if you can understand it. Because the production of tops is slow, Party A, Party B and Party D are needed together. Because pants can be produced quickly, Party C is not needed.

The strongest production capacity!