That breaks down into about 76 USD per keyboard, which if you look at a popular retailer like NewEgg is on the upper end of offerings but still sell.
I would imagine however that the cost not only includes the price to replace the keyboards but also the IT labour involved to have a look at the problem and I would imagine in the case for something like Dvorak-style keyboards the time costs involved with re-configuring the machines affected.
$9.99 for a keyboard. You gotta shop around instead of saying to the vendor “Hi I’m from the gov’t and I have a credit card with unlimited credit” : )
http://www.target.com/p/logitech-k120-ergonomic-desktop-usb-keyboard-black-920-002478/-/A-21502870#prodSlot=medium_1_3