1. From the perspective of profit rate, the profit rate of commodity A is relatively high, reaching 50%. Therefore, we should buy as many commodities as possible to maximize profits. In the question, it is required to buy at least 7 pieces of commodity B, so as long as this minimum requirement is met, but AB needs to buy with funds from 800 yuan. So, B should buy 8 pieces, 8 * 35 = 280,800-280 =

2. If you buy goods from 2 10 yuan, it is not a discount price. A commodity of 268.8 yuan, the original price should be 336 yuan, 2 10+336 = 546, you can get a 30% discount, 546*0.7=382.20 yuan.