Computing a Refund. The grocery store we use does not mark prices on its goods. My wife went to this store, bought four packages of bacon and five cartons of eggs, and paid a total of $21.41. Not knowing that she went to the store, I also went to the same store, purchased five packages of bacon and four cartons of eggs, and paid a total of $23.41. Now we want to return four packages of bacon and four cartons of eggs. How much will be refunded?