[Question]Dana normally drinks a 500 ml bottle of soda each day. Since the 500 ml bottles are currently out of stock at the store, she buys a 2-liter bottle of soda instead. If Dana continues to drink 500 ml of soda each day, how long will the 2-liter bottle of soda last? There are 1,000 ml in 1 liter.
[Answer]There are 2 * 1,000 ml = 2,000 ml in a 2 - liter bottle of soda. A 2 - liter bottle of soda lasts 2,000 / 500 = 4 days. The answer is 4.

[Question]Tom needs to buy a new gaming system. He trades in his super Nintendo for an original NES. The SNES is worth $150 and the store gives him 80% of that value. He gives $80 and gets back $10 change and a game worth $30. How much was the NES on sale for?
[Answer]He traded in the SNES for 150 * .8 = $120. Including the money he gave, he spent 120 + 80 = $200. He got 10 + 30 = $40 in change. So the NES cost 200 - 40 = $160. The answer is 160.

[Question]A store ordered 300 more than twice as many pens as it did pencils at $5 each. If the cost of a pencil was $4, and the store ordered 15 boxes, each having 80 pencils, calculate the total amount of money they paid for the stationery.
[Answer]If the store ordered 15 boxes, each having 80 pencils, they ordered 15 * 80 = 1200 pencils. If the cost of a pencil was $4, the store paid $4 * 1200 = $4800 for all the pencils. Twice as many pens as pencils that the store ordered are 2 * 1200 = 2400. If A store ordered 300 more than twice as many pens as it did pencils, it ordered 2400 + 300 = 2700 pencils. Since the cost of the pens was $5, the store paid 2700 * $5 = $13500 for the pens. The total amount of money they paid for the stationery is 13500 + 4800 = $18300. The answer is 18300.

[Question]If Janet reads 80 pages a day and Belinda reads 30 pages a day, how many more pages does Janet read in 6 weeks?
[Answer]
First find the total number of days in 6 weeks: 6 weeks * 7 days / week = 42 days. Then find the total difference in the number of pages Janet and Belinda read each day: 80 pages / day - 30 pages / day = 50 pages / day. Then multiply the daily difference by the number of days to find the total difference in the number of pages they read: 50 pages / day * 42 days = 2100 pages. The answer is 2100.