an electronics company has factories in Cleveland and Toledo that manufacture three head and four head VCR's. Each day the Cleveland factory produces 500 three head VCRs and 300 four head VCRs at a cost of $18000. Each day the Toledo factory produces 300 of each type of VCR at a cost of $15000. An order is received for 25,000 three head VCRs and 21,000 four head VCRs. For how many days should each factory operate to fill the order at the least cost.
"our teacher gave us the following answers Cleveland should operate for 20 days and Toledo should operate for 50 days. I just need to learn how t

Question

an electronics company has factories in Cleveland and Toledo that manufacture three head and four head VCR's. Each day the Cleveland factory produces 500 three head VCRs and 300 four head VCRs at a cost of $18000. Each day the Toledo factory produces 300 of each type of VCR at a cost of $15000. An order is received for 25,000 three head VCRs and 21,000 four head VCRs. For how many days should each factory operate to fill the order at the least cost. 
"our teacher gave us the following answers Cleveland should operate for 20 days and Toledo should operate for 50 days. I just need to learn how t