DIY Furnishings is planning its material purchase budget. During the month, it expects to sell 18,000 units, each of which requires 24 nails. In addition, it projects a beginning inventory of 4,000 units and a closing inventory of 4,500 units. If the standard material cost is $0.02 per nail, how much is the companys purchasing budget for nails for the month? A : $8,880 B : $10,800 C : $370 D : $6,720