A website offers a buy-one-get-one-free special for digital music albums. b. At a week-long special at the grocery store, pork shoulder is on sale at $1.99/lb, down from $3.99/Ib. c. A sharp increase in the price of wood causes increases in prices for dressers and desks. d. A company offers a coupon for $6 off the price of laser tag. e. Due to increases in hay prices, an input for raising cattle, the price of a gallon of 2% milk increases from $2.98 to $3.25.