E7-30A (similar to) Susie Anderson sells homemade knit scarves for $20 each at local craft shows. Her contribution margin ratio is 62.5%. Currently, the craft show entrance fees cost Susie $500 per year. The craft shows are raising their entrance fees by 10% next year. How many extra scarves Will Susie have to sell next year just to pay for rising entrance fee costs? Begin by identifying the general formula to compute the breakeven sales in units Breakeven sales in units