I need help on how to get the answers for other problems, if you could show your work that would be great. thank you in advance!

The asset account, Office Supplies, had a beginning balance of $3,400. During the accounting period, office supplies were purchased, on account, for $3,300. Supplies Expense for the accounting period is $4,600. What is the ending balance of Office Supplies? O A. $4,700 O B. $6,700 O C. $2,100 O D. $4,600