The Motor Works is considering an expansion project with estimated annual fixed costs of $72,000, depreciation of $38,500, variable costs per unit of $17.90 and an estimated sales price of $28.30 per unit. How many units must the firm sell to break-even on a cash basis? O 6,140 units O 7.234 units 6,579 units 6.923 units 7.766 units