Bob is building raised beds for his vegetable garden. Each bed is 2 feet high, 2 feet wide, and 8 feet long. The sides are going to be built of 1-foot wide planks. If Bob buys his lumber in 8-foot-long boards, planning to cut some of them for the shorter lengths he'll need, how many 8-foot long planks will he need to construct 10 raised beds?
Please reason step by step, and put your final answer within \boxed{}.
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