How can I prevent multiple shipping charges for multiple orders on my online store?

[elitecardsnw]

Hello!! 

My question is in regards to shipping. I use my Shopify store for my live auction sales on multiple platforms. IG, TikTok, and Twitch. I’m selling Sports and Trading Cards. When it comes to my buyers they buy multiple products but in different orders. However,  with how my store is set up currently they are charged shipping on every order. I don’t want that to happen to them. Is there a way to not have them be charged shipping on every order after the initial order? I don’t want to announce a discount code on the live auction cause I’m afraid others will use it before making the initial buy. What are my options with this? Do I just need to incorporate shipping cost into my products? I wanna keep the cost to my buyers as low as possible but don’t want to lose money on material cost of shipping. Any help would be great!! Thanks!! 

[linhle123]

did you find a solution? I find there are some apps to merge orders, like this one: https://apps.shopify.com/bestapper-mergify

Caveat: I haven't used them