In each case below, determine the effect on the sellers' total revenue and identify whether the demand curve in this particular market is elastic, inelastic, or unit-elastic in the relevant price range. a. When the price per package of a brand of chocolate chip cookies increases from $6 to $7, monthly quantity demanded decreases from 15.000 to 10.000 packages. Initial total revenue is $ and final total revenue is $. Demand is b. A fall in the price of sugar from $6 to $4 per carton raises weekly quantity demanded from 20,000 to 25,000 cartons. Initial total revenue is $ and final total revenue is $. Demand is c. A rise in the quantity demanded of a monthly fashion magazine from 35,000 to 50,000 copies occurs when its newsstand price is reduced from $11 to $8. Initial total revenue is $ and final total revenue is $ Demand is d. Daily quantity demanded of a particular model of earphones rises from 4,500 to 6,000 earphones if the price drops from 540 to 530. Initial total revenue is $ and final total revenue is 5