Suppose the only two goods that Brett consumes are average quality wine and great quality cheese. When wine sells for $10 a bottle and cheese sell for $10 a pound, he buys 6 bottles of wine and 4 pounds of cheese -- spending his entire income of $100. One day the price of wine falls to $5 a bottle and the price of cheese increases to $20 a pound, while his income does not change. The bundle of wine and cheese that he purchased at the old prices, now costs, at the new prices, ( )