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Forgive me for being anal, but in my former life I spent a lot of time |
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The way I do it (all in my head, I haven't created any Excel spreadsheets yet) is I consider each individual credit. If I send out 3 WL books at once and get 3 credits. Then those 3 credits cost roughly a $1 each. If I run out of credits and have to buy a credit, it's whatever I pay for that credit. I figure I'm getting a deal considering even if I buy a book at a UBS, I'll be paying twice as much or more than the credit cost me. The only flaw in this is that I don't factor in how much the book I sent out originally cost me. Luckily I get a lot of books for free from family and friends so maybe I don't need to bother with that part! |
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Hi Wayne, I also keep a spreadsheet about costs, but probably not anything as sophisticated as yours. I might need your help with Excel and Access at some point! I usually keep track of cost per credit earned. If you have a pile of credits, the cost of book received is going to be high because there is "potential" stored in the unused credits. So I try to calculate cost of credit earned and assume that each book I request costs one credit, however much it turns out to be in dollars and cents. I am not sure cost per book sent is a meaning statistic. After all, if you really wanted to, you can just donate them or throw them out at no cost to you. You haven't mentioned if you count the original cost of the book (which you paid) in your calculations.
Have you gotten to the point where you re-post books you've obtained through PBS using credits? If so, do you count it as a credit earned when you send out a re-post? Since you "paid" one credit for the book, and now you get one credit back, doesn't that cancel out to zero? |
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Including the anount I paid for the book would mean that I would also have to include the original cost of the book I received. ("For every Credit there is a Debit and for every Debit there is a Credit..." - a rule of bookkeeping). In that sense I just assume it is a wash over the total number of books sent and received. Have you gotten to the point where you re-post books you've obtained through PBS using credits? If so, do you count it as a credit earned when you send out a re-post? Since you "paid" one credit for the book, and now you get one credit back, doesn't that cancel out to zero? It does cancel out to zero, so it doesn't matter if I calculate re-posts or not. Since the total credits spent and the total credits earned both change, the totals stay the same - that is why the cost per credit and the cost of books received plus available credits are either the same or very similar. wayne |
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I........hate numbers. So I don't do anything like that at all. I just consider a book as the currency itself and use the 1 book = 1 credit. That's as complicated as I want to get. I don't do deals, and I send quite a few heavier hardcovers--but I have gotten quite a few of those in return too, so I figure it all evens out in the end. PBS says I've saved $6,795.00 since joining...which was...holy cow, exactly 5 years ago today. I highly doubt that...but I have saved a lot, and I also like the whole idea of recycling books. I almost never buy new anymore--only for a few series on my Keeper shelf. Cheryl |
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I think of the cost of a credit as the typical cost to mail most books . . $2.38. I know a credit costs more to by in the kiosk, and the postage is less per book if there are deals, but usually it is "mail a book, get a credit", so $2.38 |
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