How to implement tiered flat rate shipping for framed jerseys in Shopify?

We ship custom framed jerseys and use FedEx as their breakage rate is half of UPS. The problem we’re running into is we cant use a flat rate and have it add as the customer adds frames. Our shipping breaks down as follows"

1 jersey = $50

2 jerseys = $65

3 jerseys = $80

4 jerseys = $95

Then it resets for the next 4. We can package 2 jerseys in a single box then tape 2 boxes together and stay under the freight limit for weight and only charge the $15 additional per jersey because of the increase in weight. We need a way to implement this into shopify so people aren’t ordering 4x jersey framing services and the shipping showing as $50 total.

Hi @MVPAuthentics ,

You can do this with Multi Carrier Shipping Label App that integrates seamlessly with Shopify. The app allows you to create your custom boxes and automate the number of products that can fit into them & fetch you accurate shipping rates.

Let me know if you have any queries regarding this.