Cost: Enter the cost value of the shipping.
Status: Decide whether to enable this shipping for this Flat shipping.
Sort Order: The given number determines the sequence of the shipping in the ascending order menu. Eg. 1, the sorting sequence 2, 3, and so on.
Finally, check that rates and status are filled and pressing the 'Save' button in the upper right corner will save the information.
Congratulations !!! Now your store flat shipping calculation is enabled for your customer, which will help your customers make informed decisions before they make a purchase.
Let's take a look at how the flat shipping calculation works from the front end of your store