Activity-Based Costing Slack Corporation has the following predicted indirect costs and cost drivers for the most recent year for the given activity cost pools: \begin{tabular}{|l|r|r|r|} \hline & Fabrication Department & Finishing Department & Cost Driver \\ \hline Maintenance & $20,000 & $10,000 & Machine hours \\ \hline Materials handling & 30,000 & 15,000 & Material moves \\ \hline Machine setups & 70,000 & 5,000 & Machine setups \\ \hline Inspections & - & 25,000 & Inspection hours \\ \hline & $120,000 & $55,000 & \\ \hline \end{tabular} The following activity predictions were also made for the year: \begin{tabular}{|l|r|r|} \hline & Fabrication Department & Finishing Department \\ \hline Machine hours & 10,000 & 5,000 \\ \hline Material moves & 3,000 & 1,500 \\ \hline Machine setups & 700 & 50 \\ \hline Inspection hours & - & 1,000 \\ \hline \end{tabular} \begin{tabular}{|l|r|r|} \hline ZX300 & SL500 \\ \hline Direct materials cost & $12,000 & $18,000 \\ \hline Direct labor cost & $5,000 & $4,000 \\ \hline Machine hours (Fabrication) & 500 & 700 \\ \hline Machine hours (Finishing) & 200 & 100 \\ \hline Materials moves & 30 & 50 \\ \hline Machine setups & 5 & 9 \\ \hline Inspection hours & 30 & 60 \\ \hline \end{tabular} a. Determine the cost of one unit each of ZX300 and SL500, assuming a company-wide overhead rate is used based on total machine hours. Round rate to two decimal places. Overhead rate based on total machine hours per machine hour Use rounded overhead rate calculated above for calculations below. Round cost answers to the nearest whole number. Round cost per unit to two decimal places. b. Determine the cost of one unit of ZX300 and SL500, assuming department overhead rates are used. Overhead is assigned based on machine hours in both departments. Round rate to two decimal places, if applicable. Overhead rate based on machine hours for Fabrication Dept. \& Overhead rate based on machine hours for Finishing Dept. \$ x per machine hour x per machine hour c. Determine the cost of one unit of ZX300 and SL500, assuming activity-based overhead rates are used for maintenance, materials handling, machine setup, and inspection activities. Round rate to two decimal places, if applicable