I am running version 5.4.
Each box I ship has a $4.00 surcharge.
IE: Carrier charge is $15.45, customer should be charged $19.45
This worked fine for about 8 months.
Now randomly M.O.M. will charge anywhere from $4 to $12 per box.
What would cause this, and how do I fix it?
Thank you in advance to whomever can help me.