My supplier's cost and stock on hand are not updating

Please check the Office Brands Data Portal FIRST to see if the supplier on that product is the Office Brands preferred supplier for that products.

If it is - use documentation page:

Product Pricing and information does not match the web or what is on the Office Brands Data Portal

If it is not - This is possibly an RS3 data feed issue - please use documentation page:

Troubleshooting RS3 data feed issues