I have a Magento store and I'm having trouble with Credit Memos. Sometimes I need to refund individual products, sometimes a complete order. Sometimes I only need to refund the shipping cost. It is very confusing and I need someone who is an expert with Credit Memos. I've read everything I can online, even Magento's user guide, but cannot get it to work the way I want. Please only bid if you have experience with Credit Memos.