Yes and no. Cost of fuel is also a big factor. A big rig is typically running about 6 MPG, and for lighter loads that doesn't change very much if you're hauling a half-size or full-size container. Sending two trucks means burning twice as much fuel, which could easily be hundreds of dollars.

But definitely that's less of a factor with an electric truck since the charging cost will be a lot lower than a comparable amount of fuel.