I offered u my services u refused so good luck. Most places charge for labor by the hour, then parts, and then shipping it back to you if its not local. I know VST charges like 65 an hour plus, parts, and shipping back to you. But ne ways 90 bucks to fix your mpc, new parts, and then ship it back to you is a good price. But good luck with repairing it. If u dont know how to replace the switches LEAVE IT ALONE u could damage your board.
Nicole