Hi there Rodney_165,
Welcome back to the community.
QuickBooks desktop by default will always work out the the stock valuation of an item based on the weighted average of all of the different costs at which items were purchased, and then posts this average to the Cost of goods sold when said item is used in sales transactions.
There is no way to change this I am afraid. The only alternative would be to convert your data to QuickBooks online which uses a F.I.F.O (First in first out) stock system. https://quickbooks.intuit.com/community/Help-Articles/What-is-FIFO-and-how-is-it-used-for-inventory-...
