Stocking Speed

I’ve been with CVS for a couple months now and was curious if the company has a standard for stocking the truck, some days when I don’t have to run up front I can get 25-40 totes done in a single 8 hour shift, but when I have to run up front every five seconds I only average around 10-20 totes in a given shift, so what’s considered average, good and bad?