Now you need to pay 7 188+988, and you need to pay 3594 (half the price of 7plus, we assume it is the same as this year's 7 plus) for replacement next year, which means that the 7 plus will be discounted to 7 188-3594-988=2606 yuan next year. If it is not enough to buy a replacement plan, you should be able to sell 7 plus directly with a discount of 30,000 yuan. Therefore, the replacement scheme is not cost-effective.