OK il try explain this as best I can
I have a major essay where we are given a list of accounts and transactions for the month. We have to use periodic inventory. From what I believed under periodic inventory there was no need for a inventory account? Nor cogs?
So I wrote up all the accounts and the trial and adjusted and post closing and all balanced perfectly as well as my income state and b/s
HOWEVER when I came to close my accounts I realised there was no cogs account to debit or credit on my profit and loss summary nor did I have an inventory account.
So I though OK il just add inventory I must be wrong and credit and debit the beginning and end balances.
My problem is if I add an inventory account all my trial balances and reports will be thrown off $14,000!
I thought closing entries were easy!
PLEASE HELP

In the periodic system, inventory is adjusted at the end of a period based upon doing an actual physical inventory. During the period, materials bought are debited to a Purchases account. At the end of the period, the physical inventory is taken and an entry is made to close out the Purchases account and adjust the inventory account, with the difference going to COGS. Thus, Cost of Goods Sold is a calculation in the periodic system, with the formula being: Beginning inventory + Net purchases – Ending inventory

Check to see if your Purchases account is zeroed out. Is that your problem possibly?