Debit: Inventory goods 35000
Taxes payable - VAT payable (input tax) 4550
Credit: Accounts payable 39550
Sales:
Debit: Accounts receivable 13560
Credit: Main operating income 12000
Credit: Revenue from main business 12000
Taxes payable - VAT payable (output tax) 1560
Debit: Cost of main business 10500
Credit: Inventory goods 10500