Ayayai Tackle Co$.$ Ltd$.$ reports the following inventory transactions for its fishing rods for the month of April. The company uses the

perpetual inventory system. a$.$ Using FIFO, determine the cost of goods sold and the cost of ending inventory.

b$.$ Record journal entries for the sales transactions on April $9$ and April $20.$

c$.$ Assume that Big Fish Tackle wants to change to the average cost formula. Explain what guidelines the company must consider before making this change.

d$.$ If the company does change to the average cost formula and prices continue to rise, explain whether you expect the cost of goods sold and ending inventory amounts to be higher or lower than these amounts when using FIFO.