Friendly purchasing: When a large amount of products are backlogged due to natural disasters or other irresistible factors, the buyer purchases these products in a way that is not lower than or even slightly higher than the wholesale price or the market price to help producers overcome difficulties. behavior. Which of the following are friendly purchases. ['The recent rise in raw material prices and the tight supply of various electronic devices. An enterprise actively increased its prices and purchased a large number of urgently needed electronic devices from long-term suppliers to ensure the normal production of the company.', 'Due to the torrential rains that caused flash floods, dozens of acres of watermelons on the market were flooded by the local melon farmers. After the counterparts helped the city, they bought all the watermelons of the melon farmers at market prices.', 'Fruit harvest in a certain place in the south has resulted in a large backlog of unsaleable goods. Buyers have learned that the Northeast has a good sales market. They purchase in large quantities from worried fruit farmers and resell in the Northeast.', 'Although the traditional handicrafts of a certain ethnic group have successfully applied for an inheritance, their products have always been cost-effective. After vigorous promotion by folklore experts in the media, they have finally got out of the mountain and the market has responded well.']