Factor Company estimates that producing a unit of product would require $7.50 per unit of direct materials and $23.50 per unit of direct labor. Factor Company nomaly appies overhead using a predetermined overhead rate of 150% of diroct labor cost. Factor Company estimates incrementat overhead of $15.00 per unit of product. An outside supplier offers to provide Factor Company with all the units it needs at a price of \$44,00 per unit. Factor Company should choose to: Seloct ono: a. Make since the relevant cost to make it is $46.00. b. Buy since the relevant cost to make it is $46.00. c. Make ainco the relevant cost to make it is $31,00. d. Buy since the relevart cost to make it is $53.60. 6. Buy since the relevant cost to make it is $31,00