Answer:
a.
Date Account Title Debit Credit
Dec. 31, 2017 Insurance expense $2,600
Prepaid insurance $2,600
b.
Date Account Title Debit Credit
Dec. 31, 2017 Supplies Expense $9,700
Supplies $9,700
Working
Supplies = Beginning balance + Purchases - Closing balance
= 7,800 + 3,400 - 1,500
= $9,700