Time left 0:58:38 The numbers below have b_ to use in a linear regression analysis, in order to estimate the total costs for a company. X = number of units = total costs in $000) x = 25 y = 271 xy = 550 x = 65 y = 30,275 n = 15 What is the variable cost per unit using regression analysis? a. $5.34 O b. $11.00 O c. $4.21 O d. $2.21