Current location - Zhou Gong's Dream Interpretation Encyclopedia Official Website - Divination by drawing lots - Shop promotion customers draw lots to set discounts for someone's two commodities, namely, 386 yuan, 30% off and 10% off. The goods with original sales in 500 yuan are as follows.

Shop promotion customers draw lots to set discounts for someone's two commodities, namely, 386 yuan, 30% off and 10% off. The goods with original sales in 500 yuan are as follows.

a(500-386/90%)/( 1-70%/90%)

=(500-3860/9)÷2/9

=640/9÷2/9

=320 yuan

B 500-320= 180 yuan