=+Profits for both companies are 20 per cent of sales in each year. With company A, for every £1 increase in sales 7p has to be devoted to additional debtors because of the generous credit terms granted to customers. For B, only 1p is needed for additional investment in debtors for every £1 increase in sales. Higher sales also mean greater inventory levels at each firm. This is 6p and 2p for every extra £1 in sales for A and B respectively.