help with a4 please

Vice President for Sales and Marketing at Waterways Corporation is planning for production needs to meet sales deriand in the coming year. He is also trying to determin how the company's profits might be increased in the coming year. This problem asks you to use cost-volume-profit concepts to help Waterways understand contribution margins of some of its products and decide whether to mass-produce any of them. Waterways markets a simple water control and timer that it mass-produces. Last year, the company sold 699,000 units at an average unit selling price of $3.80. The varfable costs were $1,859,340, and the fixed costs were $557.802. (a1) Your answer is correct. What is the product's contribution margin ratio? (Round ratio to 0 decimal places, e.s. 25\%.) Contribution margin ratio What is the margin of safety, both in dollars and as a ratio? Round ratio to 0 decimal places, e.g. 25\%.) Margin of safety in dollars Margin of safety ratio % eTextbook and Media Attempts: unlimited (a4). If management wanted to increase its income from this product by 10%, how many additional units would have to be sold to reach this income level? Waterways would have to sell an additional units