With the country's development and prosperity, the living standards of the lower classes have significantly improved. A few years ago, Guishe City was teeming with porters vying for work, but in recent years, their numbers have dwindled considerably, leading to a significant increase in labor costs. Sister Mei's three tons of sand needed to be carried up to the sixth floor, but it was actually the fifth floor because there was a slope below, and the first floor was submerged. The sand delivery truck essentially unloaded the river sand on the second floor. Lü Yang gave Sister Mei a suggested price of 300 yuan, which was the current market price. However, Sister Mei only quoted the porter 250 yuan. The porter disagreed, saying he wouldn't do anything below 300 yuan. Sister Mei refused to

