A local blood center needs donors and has advertised on the college campus. Faculty, staff, and students all donated during the drive. Many also volunteered to help set up, hand out materials, and clean up at the end of the event. There were a total of 500 people surveyed about their involvement that day. Two hundred fifteen of them gave blood. One hundred fifty-nine helped with setting up and cleaning up, as well as handing out materials. If eighty-seven people both helped and donated, how many people neither donated nor helped?

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