Current Attempt in Progress Sheridan inc. sells vintage football jerseys for $70 each. Variable costs are $55 per unit and total fixed costs (including depreciation and amortization expense) are $81,000 per year. If sales for next year are expected to equal 10,000 jer seys, how much can variable costs per unit increase without EBIT becoming negative? (Round onswer to 2 dedimal places, eg. 2.75.) Increase in variable cost per unit