Kim, I'm a vet ( not practicing) and my other half is practicing vet, and he is testing every single sample, because as a vet you are ultimately responsible for testing and prescribed meds, I'm pretty sure that is how all vet practices should operate. and if you're wrong you're going to be in trouble not your tech.
it is a bit weird to hear from you the things you're saying given that you're a vet tech. you should know how med cost is calculated when sold to the patients or how the vet procedures cost is calculated, and how much of an actual profit is left, it is more complicated then a-b=profit. if you have the ability to get meds cheaper through your workplace- go for it.
having said that - even though i would never use Dr Frye services for obvious reasons, i respect what he is doing for frog loving community.

and a question - how come you as a vet tech don't know( or can't find out yourself) baytril dosage for a frog? I bet he was as surprised as me now