Need help figuring out part 2 of following question; I tried calculating it in excel but another student got a different answer, so I'm wrong.  "If the company wishes to increase its total dollar contribution margin by 30% in 2020, by how much will it need to increase its sales if selling price per unit, variable price per unit and total fixed costs remain constant? total increase in sales required:    ???"

3) If demand for 2022 is instead 2,500 units should the company pay to increase their capacity? Why? Please explain your calculations and reference to the chart in Figure 1. Assume units are sold at the normal price. Please mention the concept of incremental profits. Hint: If you expand capacity, you will have to pay additional fixed costs of $25,000. Remember that fixed costs are fixed within the relevant range. If you expand capacity then you are outside this range. If you expand capacity then you can make revenue on 500 additional units at the normal price and would pay variable costs on 500 additional units. Please consider the incremental profit or loss of expanding capacity. The incremental profit is the increase in revenues minus the increase in costs of adding 500 more units. If the incremental profit of expanding capacity is positive then you should do so.

Please do not give solution in image format ? And Fast answering please and explain proper steps by Step.