need help solving this!

This is a partial adjusted trial balance of Sandhill Co SANDHILL CO Adjusted Trial Balance January 31, 2017 Debit $810 1,230 Credit Supplies Prepaid Insurancee Salaries and Wages Payable Unearned Service Revenue Supplies Expense Insurance Expense Salaries and Wages Expense Service Revenue $1,940 860 890 410 1,910 2,460 Answer these questions, assuming the year begins January 1 If the amount in Supplies Expense is the January 31 adjusting entry and $220 of supplies was purchased in January, what was the balance in Supplies on January 1? Supplies balance 1480