If the production of A-X parts is cancelled, B (50-x) parts will be produced.

9x+4(50-x)≤360

3x+ 10(50-x)≤290

The solution is 20≤x≤40.

So a ***2 1 species

That is, A 20 B 30, A 2 1 B 29, ... A 40 B 10.

(2)Y = 700 x+ 1200(50 x)=-500 x+60000

Because -500

So when x is the smallest, y is the largest.

That is, when X=20, the maximum value of y is 50000.