A manufacturer of exercise equipment purchases pulleys from a supplier who lists these prices: less than 1,000, $5 each; 1,000 to 3,999, $4.95 each; 4,000 to 5,999, $4.90 each; and 6,000 or more, $4.85 each. Ordering cost is $50 per order, annual holding cost is 20 percent of purchase cost, and annual usage is 4,900 pulleys. Determine the order quantity that will minimize total cost.

Rolston music company is considering the sale of a new sound board used in recording studios. the new board would sell for $27,200, and the company expects to sell 1,570 per year. the company currently sells 2,070 units of its existing model per year. if the new model is introduced, sales of the existing model will fall to 1,890 units per year. the old board retails for $23,100. variable costs are 57 percent of sales, depreciation on the equipment to produce the new board will be $1,520,000 per year, and fixed costs are $1,420,000 per year. if the tax rate is 35 percent, what is the annual ocf for the project?