Thecost structure of Dennis's Retail Mart is dominated by variablecosts with a contribution margin ratio of 0.35 and fixed costs of$86,380Every dollar of sales contributes 35 cents toward fixedcos The cost structure of Dennis's Retail Mart is dominated by variable costs with a contribution margin ratio of \( 0.35 \) and fixed costs of \( \$ 86,380 \). Every dollar of sales contributes 35 cents 2 answers