Deng Corp. produces hydraulic lifts that are used by hospitals to move bedridden patients. The costs of manufacturing and marketingthe hydraulic lifts at the company's standard normal volume of 4,200 units per month are as follows: Cost per Unit of Hydraulic Lifts Unit Manufacturing Costs 510 Variable materials 765 Variable labour 410 Variable overhead 720 Fixed overhead Total unit manufacturing costs $2,405 Unit Marketing Costs 255 Variable 685 Fixed 940 Total unit marketing costs Total unit costs 3,345 Required: 1. At a sales price of $6.230 per unit, calculate (a) the break-even volume in units and (b) the break-even sales in dollars. (Round up "Break-even volume in units" to the next whole number. Do not round other intermediate calculations.) Break-even volume in units Break-even sales in dollars