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 Direct Materials Output in Units 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 Rent Expense $ 5,730 5,730 9,168 9,168 9,168 9,168 9,168 9,168 11,460 11,460 11,460 $4,584 8,251 7,800 10,400 13,000 15,600 18,200 20,800 33,578 40,110 50,424 Determine the relevant range of activity for this product. The relevant range of activity for this product units