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
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I don’t understand your question can you explain it more
1.636x10^5 after adding or 163600 depending on the form wanted
$58.80 you need to multiply 2.80 x 21 to get your answer