During the accounting period, office supplies were purchased

During the accounting period, office supplies were purchased on account for $3,200. A physical count, on the last day of the accounting period, shows $1,100 of office supplies on hand. Supplies Expense for the accounting period is $3,600

What was the beginning balance of Office Supplies?
A) $4,700
B) $2,100
C) $1,500
D) There is not enough information to answer this question.

ANSWER

C .Office Supplies:
Ending balance $1,100
Add Office Supplies expensed 3,600
4,700
Less Office Supplies purchased 3,200
Office Supplies Beginning Balance $1,500