Which of the following is the inequality/equality that describes the time constraint of the forming department?

A) A/50 + B/40 + C/20 + D/20 ≥ 330
B) A/50 + B/40 + C/20 + D/20 ≤ 330
C) A/30 + B/40 + C/20 + D/20 = 330
D) A/50 + B/40 + C/20 + D/20 = 330

The time constraint for the forming department is given by the sum of the time taken for each type of steel sheet to pass through the forming department. This is given by A/50 + B/40 + C/20 + D/20, which should be less than or equal to the available time of 330 hours. Therefore, the correct inequality is A/50 + B/40 + C/20 + D/20 ≤ 330. To maximize profit, we would need to solve the entire linear programming problem, not just this one constraint.