Xiao Li and Xiao Wang can process 8 parts per hour. Xiao Li starts work at 6 am and Xiao Wang starts work at 8 am. When will the total number of parts processed by the two reach 80?
小李和小王每小时都可加工8个零件，小李上午6时开工，小王上午8时开工，做到什么时候，两人加工零件的总数达到80个？
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