1. 2. Compute the total estimated indirect manufacturing cost for 2018. Prior to 2018, Edmund used a single plantwide overhead allocation rate system with direct labor hours as the allocation base. Compute the predetermined overhead allocation rate based on direct labor hours for 2018. Use this rate to determine the estimated indirect manufacturing cost per wheel rim for each model, to the nearest cent. Compute the estimated ABC indirect manufacturing cost per unit of each model for 2018. Carry each cost to the nearest cent. 3