Yet another newbie here. We are not up for paying another monthly app fee to be able to have per item shipping costs. Because our volume will be low, we want to adjust the invoice for actual USPS rates before capturing the credit card payment. Will that work with the basic shopify? For example, your $50.00 purchase will show a $15.00 shipping at checkout for a total credit card charge of $65.00. But after packing, I will go into admin that night and adjust to the $6.80 flat rate USPS bag charge before manually capturing the credit card payment of 56.80. We understand that we will never upcharge. Is this possible?
There are no fees charged on refunds, only captured amounts are charged fees.
The ideal app for per product shipping rates is Better Shipping, it's not badly priced and has a 7 day trial on it also :)