On January 1 2020, South by Southwest Company used least squares regression analysis to estimate the total monthly payroll department cost of the company in 2020. The followings are the output from the regression analysis based on the observation of the payroll department cost( dependent variable) and the labor hours worked ( independent variable) for the last 20 months: Constant $18,000 r2 0.8924 X coefficient(s) $ 2.55 Required: BASED ON THE OUTPUT FROM THE REGRESSION ANALYSIS

a. What is the total estimated fixed payroll department cost?

b. What is the variable payroll department cost per labor hour?

c. What is the estimate cost function of the payroll department cost?

d. What is the coefficient of determination? Comment on the goodness of fit of the cost function?