i discovered that my Cost of Sales for 2 previous months changed substantially since my last report. wondering what could cause this as my sales figure remains same.?

Hello, funmirajayi. 

Thank you for reaching out to the Community. I am more than happy to assist you! There are various factors that can lead to changes in your Cost of Sales in QuickBooks Online. For instance, alterations in the cost of materials or inventory, adjustments in supplier pricing, changes in labor costs, and fluctuations in shipping or freight costs can all impact. 

It's important to review your transactions, inventory records, and pricing information to identify the reasons for the substantial changes in your Cost of Sales. If you need further assistance, I recommend consulting with an accountant who can provide personalized guidance based on your situation. 

If you're looking to track your inventories in QBO, you've come to the right place. This article covers everything you need to know to keep your inventory organized and up to date. Whether you're just starting or a seasoned QBO user, you'll find helpful tips and tricks to simplify inventory management. 

• Set up and track your inventory in QuickBooks Online
• Add inventory products in QuickBooks Online

Alternatively, you need to run specific reports to gain more information about the items you buy and sell and the status of your inventory. These reports will provide detailed insights into your inventory, including stock levels, sales performance, and purchase history. By analyzing this data, you can make informed decisions about managing your inventory more efficiently and effectively. Make sure you run these reports regularly to stay on top of your inventory and optimize your business operations: Use reports to see your sales and inventory status.

Stay in touch with us if you need further assistance. We're always here to help. Have a great day!