Updating prices is done basically the same way as updating stock levels. There are only two differences.

1. Instead of specifying the stock levels, specify the prices in the WooCommerce add-on.

2. Instead of entering in the field names for stock levels, specify the correct Custom Field names for prices in Choose which data to update in Step 4.

If the custom field to update doesn't appear, you can type it in and hit return/Enter.