Let the width of the frame = x Let the cost of a linear foot of the frame = y Let the inside dimension of the length of the frame = a Let the inside dimension of the width of the frame = b.
The total length of the frame = 2*a + 4x The total width of the frame = 2b
The total amount of the frame in feet is (2a + 4x + 2b)*y = Cost If this is incorrect please leave a message on my home page.