Blossom Best Accounting and Tax Services pays $240 per month for a tax software license. In addition, for each tax return prepared, the business incurs variable costs of $60 per return. The relevant range for Blossom Best Accounting and Tax Services is 80 - 320 tax returns per month. What is the total monthly cost and per unit cost if the business prepares (Round per unit cost to 2 decimal places, e.g. 15.25.) a. 120 returns? b. 160 returns? c. 240 returns? a. +A $ Total Monthly Cost b. $ +A $ +A $ +A Per Unit Cost