Identify the proper point to recognize expenses for each of the following transactions.

a. Julio Inc. purchases for cash five custom dining tables for \(\$ 1,200\) each in March. Three tables are later sold for \(\$ 1,750\) each in April, and the remaining two tables are sold for \(\$ 1,500\) each in May.

b. Craig Company purchases \(\$ 400\) of office supplies that are both paid for and used in August.

c. Kerra Company purchases \(\$ 500\) of inventory on account in July. The inventory is sold for \(\$ 650\) in August. Kerra pays its suppliers the \(\$ 500\) due in September.