What this is about
Quantity × price deviates from the line amount. With third-party files this is often just rounding, but it can be a real error.
What to do
Recalculate the line amount; mind the base quantity (BT-149) for unit prices.
Does the error keep coming back?
Then it is not chance but a pipe connected the wrong way. The free 15-minute check finds the spot.
Arrange a check