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To £400, this sum from 285 II, leaves 215 II,. Then we have: 80c+12v-28s; s'=233 »/,%, P'=§S=30 Hence, we see.
To £400, this sum from 285 II, leaves 215 II,. Then we have: 80c+12v-28s; s'=233 »/,%, P'=§S=30 Hence, we see.