Yes we combine shipping. add items to your cart, commit to buy, request total from seller. We will send a invoice. You CAN NOT do this with a phone app. We will not refund on shipping if not done correctly. We can not get to all emails in the end there are just to many but we try our best to answer them all. we have been selling parts small engine parts on ebay for almost 20 years now as one of the largest sellers on the net. we do our best to describe our item but once in a while a problem does happen and we do our best to make it right. in the end YCFS but will make it right if we have made a mistake thank you for your business C.C.P.