Answer:
$1,500
Explanation:
Given that,
Closing office supplies = $1,100
Office supplies expense for the month = $3,600
Office supplies were purchased on account = $3,200
Opening stock + Purchases - Closing stock = Consumption
Opening stock + $3,200 - $1,100 = $3,600
Opening stock + $2,100 = $3,600
Opening stock = $3,600 - $2,100
= $1,500
Therefore, the beginning balance of Office Supplies is $1,500.