Flexible Shipping UPS – trying to set up Shipping classes i think

Hi. Not sure if there is a separate for the Flexible Shipping UPS plug in but i found this one so here’s my question.

I am helping my brother out with building his woocommerce shop and I am currently running into an issue that I really want to solve.

I have ten products that require 2 day shipping. It is a type of food and needs to be at customer within two days.

I also have two products that are non perishable/just dry and dont need to get there fast.

I want to have two different rates..if somebody just buys the dry stuff I want there to be cheaper shipping. The plug in we are using Flexible Shipping by WP Desk but i can’t seem to figure out how i can do this.

Can it be done on the free plug or do I need the table rate plug in? Thank you!