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 Rent Direct in Units Expense Materials 1,000 $6,350 5,080 6,350 10,160 10,160 10,160 10,160 10,160 10,160 12,700 12,700 12,700 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 9,144 8,700 11,600 14,500 17,400 20,300 23,200 37,211 44,450 55,880 (c) Calculate the variable costs per unit within the relevant range. (Round answer to 2 decimal places, e.g. 1.25.) Variable costs per unit per unit