X+Y=20

50x+ 100y = 1600 (2 composition equations)

Solution: x = 8 y = 12.

Answer: 8 days for finishing and 0/2 days for rough machining.

2, 8 * 50 * 500+12 *100 * 300 = 200000+360000 = 560000 (yuan)

A: The company can make a profit of 560,000 yuan from processed wood.