Sherri's Tan-O-Rama is a local tanning salon. Its regression output is as follows: Intercept X Variable 1 4,611.35 3.50 Suppose that the company charges $9.60 per tanning session. Calculate the unit contribution margin. Calculate contribution margin ratio Round your contribution margin ratio percentage to two decimal places ie .1234 should be entered as 12.34% Contribution Margin Ratio