How much $ does canon charge to calibrate

I bought a 400 f/5.6L and a 300 f/2.8L at an estate sale. got a pretty good deal but found they both front focus. I carefully tested them on tripod with some print cartridges lined up and focused on the print. My other canon lenses were spot on but these two are off.

How much can I expect to pay Canon Irvine to calibrate these?

Thanks
David

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The tolerance and understanding necessary to heal must come from each and every one of us, arising out of our everyday conduct until decency reaches a flood tide.
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