The cost structure of Dennis's Retail Mart is dominated by variable costs with a contribution margin ratio of $0\mathrm{.}32$ and fixed costs of $$97,280.$ Every dollar of sales contributes $32$ cents toward fixed costs and profit. The cost structure of a competitor, Oakfield Convenience Store, is dominated by fixed costs with a higher contribution margin ratio of $0\mathrm{.}68$ and fixed costs of $$571,520.$ Every dollar of sales contributes $68$ cents toward fixed costs and profit. Both companies have sales of $$1,216,000$ for the year.

Required:

Compare the two companies$$ cost structures.

Suppose that both companies experience a $20$ percent increase in sales volume. By how much would each company$$s profits increase?