Accounting Problem about Ending Inventory, Purchases, Accounts Payable, act.

This is an accounting problem has three required parts:

1.Determine the correct amounts for 2013 ending inventory, purchases, accounts payable, sales revenue, and accounts receivable.

2. Calculate cost of goods sold for 2013.

3. What was the effect of the error in ending inventory on 2012 before-tax income?

You should fill the blanks and also show the calculating processing for me.

Download the document (CH8&9.docx) and make sure you have confidence to do those correctly, or I will ask for refund.