Two models of a product Regular (X) and Deluxe (Y) are produced by a company. A linear programming model is used to determine the production schedule. The formulation is as follows:

Maximize profit = 50X + 60Y

Subject to: 8X + 10Y 800 (labor hours)

X + Y 120 (total units demanded)

4X + 5Y 500 (raw materials)

all variable 0

What is the optimal solution?

a	50X and 60Y
b	75X and 30Y
c	100X and 0Y
d	90X and 10Y