I need help with these three questions. Why are these answers being marked wrong?

Business Solutions sells upscale modular desk units and office chairs in the ratio of 3:2 (desk unitchair). The selling prices are $1,170 per desk unit and $420 per chair. The variable costs are $670 per desk unit and $170 per chair. Fixed costs are $300,000. Required 1. Compute the selling price per composite unit. 2. Compute the variable costs per composite unit. 3. Compute the break-even point in composite units. 4. Compute the number of units of each product that would be sold at the break-even point Answer is complete but not entirely correct. Complete this question by entering your answers in the tabs below Required 1 Required 2 Required 3 Required4 Compute the selling price per composite unit. Selling price per composite $ 870 unit Answer is complete but not entirely correct Complete this question by entering your answers in the tabs below. Required 1Required 2 Required 3 Required4 Compute the varilable costs per composite unit. Variable costs per composite unit $ 470 Answer is complete but not entirely correct. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Required 4 Compute the break-even point in composite units Break-even point 750COmposite units