Jamal owns a small retail store as a sole proprietor. The business records show that the cost of the store's inventory items has been steadily increasing. The cost of the ending inventory is $$200,000,$ and the cost of the beginning inventory was $$250,000.$ Jamal uses the FIFO method of inventory valuation. Which of the following statements is true?

a$.$ Jamal has apparently decreased the volume of items in his ending inventory as compared to the number of items in his beginning inventory.

b$.$ Jamal purchased more inventory during the year than he sold during the same $1-$year period.

c$.$ Since the cost of the store's inventory items is increasing, Jamal will have a greater cost of goods sold figure under FIFO than LIFO.

d$.$ Jamal would have a higher net income if he used the LIFO method of inventory valuation instead of the FIFO method.