Is it legal to dock pay in this situation in Washington State?

Question

Two nights ago I came up short $17 and some odd cents on my credit card receipts (I am a cashier at a farmer's market). I ran the numbers twice more and it came up the same. I submitted this to my boss (the farmer) who returned to me today claiming i was actually $25.68 short, and he said that he would be docking my pay. He cited that i did not total the order properly and that I charged the customer for only the last item paid, not on the whole bill, thus coming up short by the difference. I recognize that i may have made a mistake and that he may be right, but is this even legal for him to do that?

Answer 1

Your pay cannot be reduced below minimum wage.  You should discuss this law (Fair Labor Standards Act) with your employer and if necessary, complain to the Labor Board.  

Answer 2

I don't believe that is legal. Find another job.