Need to understand how to compute this, Step by Step breakdown, Don't just provide the answer, I need to understand each step and the how and why I am doing it a specific way. Thank you

Consider the following data for two products of Vigano Manufacturing. 1. Using a plantwide overhead rate based on 5,000 direct labor hours, compute the total product cost per unit for each product. 2. Consider the following additional information about these two products. If activity-based costing is used to allocate overhead cost, (a) compute overhead activity rates, (b) allocate overhead cost to Product A and Product B and compute overhead cost per unit for each, and (c) compute product cost per unit for each. b. Allocate overhead to Product A,B and compute overhead cost per unit