With the integration turned on in both your BQool and InventoryLab accounts, your cost-per-unit amounts are automatically syncing regularly. However, you can export a compatible Repricing Central file if you need to import both your buy costs and your Min/Max prices into BQool.
After entering your Min/Max data while listing, once the batch is closed, navigate to History.
Select Closed Batches.
Click the batch name you would like to export. Once in the closed batch details page, click the three stacked dots and select Export bQool Repricing Central.
This creates an export that auto-populates Channel, SellerSKU, Cost, Min Price, and Max Price.
It will save to your computer, where you can open in a spreadsheet program like Excel. You can then fill in your Additional Cost, Rule Name, Shipping, add-delete, Group, and Enable Repricing options.
BQool's article on this process can also be found here: InventoryLab: Min Price and Max Price Manually Download and Upload.