Exercise 18-2 (Part Level Submission) Shingle Enterprises is considering manufacturing a new product. It projects the cost of direct materials and rent for a range of output as shown below Output Direct in Units Rent Expense Materials 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 1,000 6,550 $ 5,240 6,550 10,480 10,480 10,480 10,480 10,480 10,480 13,100 13,100 13,100 9,432 6,900 9,200 11,500 13,800 16,100 18,400 38,383 45,850 57,640 (b) Determine the relevant range of activity for this product The relevant range of activity for this product units