A company started the year with $500 of supplies. During the? year, the company purchased an additional $1,000 of supplies. There were $900 of supplies on hand at the end of the year. An adjusting entry prepared at the end of the accounting period includes? a:
A. debit to Supplies for $900.
B. debit to Supplies for $500.
C. debit to Supplies Expense for $400.
D. debit to Supplies Expense for $600.