Final answer:
To determine costs assigned to ending inventory and cost of goods sold using FIFO and LIFO, start with the oldest or most recent purchases and work towards the most recent or oldest ones respectively. Compute the gross profit by subtracting cost of goods sold from net sales.
Step-by-step explanation:
Step 1: Determine the system of interest, which in this case is the inventory costing method. The information given is the cost of goods available for sale and the quantity of goods sold. The quantity to be calculated is the costs assigned to ending inventory and to cost of goods sold.
a. FIFO (First-In, First-Out): In this method, the costs assigned to ending inventory are based on the costs of the most recent purchases, while the costs assigned to cost of goods sold are based on the costs of the oldest purchases. To calculate these costs, start with the earliest purchases and work towards the most recent ones.
b. LIFO (Last-In, First-Out): In this method, the costs assigned to ending inventory are based on the costs of the oldest purchases, while the costs assigned to cost of goods sold are based on the costs of the most recent purchases. To calculate these costs, start with the most recent purchases and work towards the oldest ones.
c. To compute the gross profit for each method, subtract the cost of goods sold from the net sales.