During the Accounting Period,office Supplies Were Purchased on Account for $3,900.A

During the accounting period,office supplies were purchased on account for $3,900.A physical count,on the last day of the accounting period,shows $1,600 of office supplies on hand.Supplies Expense for the accounting period is $3,100.What was the beginning balance of Office Supplies?

A) $4,700
B) $2,300
C) $800
D) There is not enough information to answer this question.