Marrick Company inakes one product, for which it has established the following standards for materials: Average quantity of material per unit of product: 4.5 pounds Price per pound of materials, $8 During March, Marrick made 10,000 units of the product, using 50,000 pounds at a total purchase price of $412,500. Required: (a) Determine the total flexible budoet materials variance and indicate whether it is favorable or unfavorable. 6) Calculate the materials price variance and indicate whether it is favorable or unfavorable. (c) Determine the materials usage variance and indicate whether it is favorable or unfavordble. (Do your answers to (b) and (c) add up to the answer in (a)? 168