ouvenir sheets to stamp collectors. The postal service purchases the souvenir sheets from a supplier for $1.80 each. St. Vincent has been selling the souvenir sheets for $14.00 each and ordinarily sells about 100,000 units. To test the market, the postal service recently priced a new souvenir sheet at $12.60 and sales increased to 114,000 units. Required: 1. What total contribution margin did the postal service earn when it sold 100,000 sheets at a price of $14.00 each

What outputs a and b (in millions of dollars per year) should the two industries generate to satisfy the demand? you may be tempted to say 1,000 and 780, respectively, but things are not quite as simple as that. we have to take into account the interindustry demand as well. let us say that industry a produces electricity. of course, producing almost any product will require electric power. suppose that industry b needs 1o¢ worth of electricity for each $1 of output b produces and that industry a needs 20¢ worth of b's products for each $1 of output a produces?