The Mann Corporation began operations in Year 1. Information relating to the company's purchases of inventory and sales of products for Year 1 and Year 2 is presented below. Calculate the weighted-average cost of goods sold and ending inventory for Year 1 and Year 2 assuming use of (a) the periodic method and (b) the perpetual method. a. Weighted-Average Periodic. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number. b. Weighted-Average Perpetual. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number