Each of the three oldest children sleeps in a twin bed. they all need bed sheets. a brand of sheets is on sale for "but one get one at 50% off".if each sheet costs $18.00, how much will two sheets cost? how much will six sheets cost?

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.