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left page blank right page (back of cover) sequence of equations: 283 ce. ------ 500 [[box drawn around this]] 25 136.50 ------ 1 136 2 ------ 272 240 cc 500 cc 272 ------ 240 36 3 ------ 1080 800 ------ 1880 480 gr 272 gr 272 480 gr 480 - 272 480 - 272 x 800 --------- 480 1360|48 ------- 296 283 ----- 400 384 ----- 160