The unit expects to sell 20,000 drills in January; 25,000 in February, 25,000 in March, and 30,000 per month thereafter. The selling price is $100 per drill. Half of the drills will be sold for cash through a website. The others will be sold to retailers on account, who pay 40% in the month of purchase, and 60% in the following month. Uncollectible accounts are not material.