0. The Excelsior Mining Company operates two mines, EMC 1 and EMC 2. EMC produces 20 tons of lead ore and 30 tons of low -grade silver ore per day of operation . EMC 2 produces 15 tons of lead ore and 35 tons of low-grade silver ore per day of operation . Lead ore sells for $ 14 per ton and low- grade silver ore sells for $ 34 per ton . The company can sell at most 630 tons of the low- grade silver ore per month , but it can sell all the lead ore it produces . However , there is no space available for stockpiling any silver ore . The com- pany employs one crew and operates only one of the mines at a time. Furthermore , union regula- tions stipulate that the crew not be worked in excess of 20 days per month. How many days per month should Excelsior schedule for each mine that the income from the sale of the ore is a maximum ?
0. The Excelsior Mining Company operates two mines, EMC 1 and EMC 2. EMC produces 20 tons of lead ore and 30 tons of low -grade silver ore per day of operation . EMC 2 produces 15 tons of lead ore and 35 tons of low-grade silver ore per day of operation . Lead ore sells for $ 14 per ton and low- grade silver ore sells for $ 34 per ton . The company can sell at most 630 tons of the low- grade silver ore per month , but it can sell all the lead ore it produces . However , there is no space available for stockpiling any silver ore . The com- pany employs one crew and operates only one of the mines at a time. Furthermore , union regula- tions stipulate that the crew not be worked in excess of 20 days per month. How many days per month should Excelsior schedule for each mine that the income from the sale of the ore is a maximum ?
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