RE: Loan Interest Payment Puzzle / Question
May 1, 2017 at 9:03 pm
(This post was last modified: May 1, 2017 at 9:11 pm by brewer.)
My loss of interest is compounding.
I don't have an anger problem, I have an idiot problem.
Loan Interest Payment Puzzle / Question
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RE: Loan Interest Payment Puzzle / Question
May 1, 2017 at 9:03 pm
(This post was last modified: May 1, 2017 at 9:11 pm by brewer.)
My loss of interest is compounding.
I don't have an anger problem, I have an idiot problem.
P.S. Both loans are at hefty rates. the 5% per month compounds up to 75%c. (1.05^12) and the 3% one to slightly under 50%.
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Tazzy I don't think your calculations are correct, but I'm not sure where it's gone wrong.
Steel's first result matches mine but I think he has a bug when he calculated the second result (paying off the larger loan first) because somehow the interest for that loan ends up being higher than the first result which makes no sense. My results: RE: Loan Interest Payment Puzzle / Question
May 1, 2017 at 9:18 pm
(This post was last modified: May 1, 2017 at 9:19 pm by SteelCurtain.)
Oops, disregard that last one, had a bug in my code... (That was my birthday present to Tibs)
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---
I think Tazzy's problem is in adding up the payments. Seems when he pays a partial payment he is calculating it as a full payment plus the partial payment both times.
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---
I'll look them over tomorrow when I'm with working brain.
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I'll reply to meself as I can see where I went wrong last night:
(May 1, 2017 at 6:27 pm)Tazzycorn Wrote: Ok I did a quick excel working of the problem. Problem 1) Every line after the inserted bold 1 is wrong, because as our glorious Imperator says I made a double payment of $1,000 that month. Should read Code: 3,771.30 1.05 3,959.86 135.09 3,824.77 Which means 17 payments of $2,000 and a final payment of $122.65, which is $34,122.65, meaning my original statement was wrong, it is better to clear the small loan first. The first set of calculations are right as far as I can see. Oh dear, and the half and half calcuations has another error, a copy pasta one. The last two lines of the big loan payments show $2,001 and $2,002 payments, because I forgot to ensure I was copying the cells rather than filling a series. This means an underpayment of $5.03 due to my original calculations. The formulae in the spreadsheet are correct, both cases were down to errors in my inputting of figures.
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Excellent, it looks like I won't need to fire my financial advisor after all.
RE: Loan Interest Payment Puzzle / Question
May 2, 2017 at 10:28 am
(This post was last modified: May 2, 2017 at 10:54 am by Jackalope.
Edit Reason: Ugh, grammar fail
)
It's pretty clear what the answer is mathematically, but I think you can noodle it out another way.
Each month, I have X dollars I can apply to competing debts above and beyond what the minimum payments are. Here's the thing - by making that principal payment today, you are only avoiding future interest on the amount of the principal payment. The total amount of the loan is irrelevant for the purpose of applying this one principal payment - you're paying interest on that money regardless. You avoid more future interest on the amount of this payment by applying it to the loan with the higher interest rate. Repeat this exercise each month and I see no reason why the analysis should change.,
I'm just sitting here like dude... I work as a loan assistant at a bank... pay off the smaller one cause I said so.
Y'all bring out the math and proof. lol
“What screws us up the most in life is the picture in our head of what it's supposed to be.”
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