How to Add/Update shipping costs
Configuration>Plugins>Local Plugins
Ctrl+F : Shipping Director > Configure
Find the most recent ( at the bottom) number used for " OptionExit"
Example:
* note everything in this section is Case and Space sensitive. If it is not perfect - it will not work.
Set: Order / Active/ Type: Name and Expression
Enter information and save
You are now charging store 286 $19.99 for flat rate shipping