Donuld Company sells many products. Sol is one of its popular items. Below is an analysis of the inventory purchases and sales of Sol for the month of September (18 points) Date 9/1 160 9/3 Purchase Description Beginning inventory Purchase Purchase Purchase 9/10 9/30 Total Units Unit Cost 100 60 20082 40 90 4001 Total 6000 4680 16400 3600 30,680 Total units sold during the month is 240. Questions : a. Using the LIFO assumption, calculate the amount charged to cost of goods sold and ending inventory for September. (Show computations) (6 points) b. Using the FIFO assumption, calculate the amount charged to cost of goods sold and ending inventory for September. (Show computations) (6 points) c. Calculate the LIFO reserve (2 points). d. Using the average cost assumption, calculate the amount charged to cost of goods sold and ending inventory for September. (Show computations) (4 points)