Selland, Inc. has collected the following information on its copying costs for the month. Number of copies Total copying costs Week 1 1,400 $580 Week 2 1,150 $520 Week 3 560 $300 Week 4 400 $200 Required: 1. Using the high-low-method, compute the variable cost per copy. 2. Compute the total fixed cost per month. 3. Represent the copy cost function in equation form