Where is the optimal solution and how much is it?

You are in the business of making shirts and skirts. The profit on each shirt is $40 and on each skirt is $60. The number of skirts should not exceed 50. It takes 1 hour to make a shirt and 2 hours for a skirt. Both shirt and skirt utilize 1 square yard of fabric each. You have a total of 125 hours of labor and 100 square yards of fabric.

A-----At (25, 50) and $4,000

B-----At (75, 25) and $4,500

C-----At (100, 0) and $4,000

or D----At (0, 50) and $3,000