The new supply and demand curves within University City are S0 and D0. But after the county commission imposed a $3 per six-pack excise tax upon beer, monthly sales of six-packs: (w) fell to 10,000, and buyers paid $6.50 each, but sellers received simply $3.50 after taxes. (x) increased by 4,000 to 10,000 six-packs at a cost to buyers of $3.50 each. (y) fell by 10,000, and the price to buyers increased through $3 per six-pack. (z) fell to 4,000, although the price stayed stable at $5 per six-pack.
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