My Grocery shopping was exactly $40.00

GG, GG, GG, GG, G&G, GG
- Thanks for making me spend like 30 seconds of my life reviewing someone's grocery receipt. We're really starting to stretch the mildy part of mildly interesting, but apparently I'm here for it.
  
  This right here is exactly the kind of content that was posted in r/mildlyinteresting when it was new. After the sub went popular the content was way too interesting for my liking.
  
  Sigh people will upvote anything here. I bet you’d upvote a picture of a can of beans…
- Good & Gather, one of Target's store brands, in case anyone was actually curious.
  
  Thanks gg

all this, four naught

Where do you live that there's no tax?
- Arizona, Groceries aren't taxed here.
  
  Got it. I thought this was a restaurant receipt for Panera, but groceries makes more sense not to tax.
  
  Groceries aren't taxed? Wow
- I don't know where OP is, but here in Massachusetts, we have no sales tax on groceries:
  https://www.salestaxhandbook.com/massachusetts/sales-tax-exemptions
  
  Got it. I thought this was a restaurant receipt for Panera, but groceries makes more sense not to tax.
- NE has the same no-grocery tax rule. A handful of states have no sales tax in general (I believe SD and either NH or VT for example) and many, if not all, won't tax groceries purchased with whatever food stamps are called in the respective state
- No sales tax in Oregon, but income taxes are rough. My friend moved across the river to Vancouver, WA and makes ~$50k more a year from tax savings.
  
  Sounds like your friend is very wealthy.

Really stretching that mildly part huh bud ?
- Yeah I'm on the edge of my seat here. I demand a refund.
  
  Right? How am I supposed to judge someone's groceries (the real reason we're here) if it's G's all the way down?!

Target, I presume?
- OP certainly hit this target.
- I was thinking OP lived in some libertarian utopia.

- I was wondering the same thing. I was trying to buy exactly 10 items because that's the max they allow at the self check out now. I'm wondering if that increase the odds greatly or something.
  
  Buying 10 items would definitely make this way more likely, because we have a base-10 counting system.
  To simplify the problem, if you look at the cents digit, $0.09×10 items = $0.90. If you look at both cents digits, they were mostly $0.99. $0.99×10 items = $9.90.
  All you'd need in either case there is something to cost $0.10 more to get a nice even number.
  
  If all the prices are $x.x9 then it's only possible if you buy a multiple of 10 items.
  1 item will send with a 9
  2 items will end with an 8
  3 items will end with a 7
  ...
  9 items will end with a 1
  10 items will end with a 0

GG

Am i being stupid....how does 10 numbers ending in 9 end up ending in 0?
I know it works, ive added it up myself but it shouldn't work should it?! Am i going crazy?!
- 9*10=90 Ends in 0.
  
  Ffs how did i not think about that!! Haha! Thanks!
  
  Yes but how
- Literally any time you do anything like 10 × n it will end in a zero. All multiples of ten end in zero.
  Same with 100 × n: it will always end with 00.
  
  Yeah i was hung over and tierd and my brain just wasnt working. You wont believe me but i actually used to be pretty good at maths in school, but that was a while ago now.😅
- Ten number ending in 9 is essentially the same as those same ten numbers but ending in zero plus ten nines.
  $1.19 = $1.10 + 0.09
  $1.19 + $1.69 = $1.10 + $1.60 + (2 * 0.09)
  Since there were 10 items, each ending in a 9, that's the same as 9 times 10, or in this case $0.09 * 10. Every time you multiply by 10 you end up with a zero on the end.
  In a base 10 system multiplying by 10 basically shifts all the digits over by 1 and adds a zero to the end. Whatever was in the 10s spot goes in the 100s spot. Whatever was in the 100s spot goes in the 1000s spot, and so on.
  So, if you buy 10 items with a 9 at the end of their price, you'll always end up with a zero in the cents spot. If you buy 100 items like that, your total will be in dollars with zero cents.
  What's more impressive here is that so many of the other digits ended up as zero when there was no pattern. Ten items ending in '9' means that you carry over a '9' to the next column, but to get that to be zero means the sum of all the tens (of cents) digits needed to end up in a 1.
  1 + 6 + 9 + 4 + 9 + 9 + 6 + 6 + 2 + 9 = 61
  And to get to exactly 40, the dollars digits needed to match that 6 plus 1 carried over (1 + 9), so they needed to end in 3 (or to be 33 exactly for the total to be 40):
  1 + 1 + 6 + 5 + 3 + 3 + 5 + 5 + 3 + 1 = 33
  Ignoring the fact that grocery stores suck and price things ending in 9 all the time, it's a 1/10 shot to get the cents digit to end up as a zero, a 1/10 shot for the hundreds to end up as zero, and 1/10 for the dollars digit to end up as a zero. OP just used up a lifetime of luck for a 1/1000 occurrence.
  To OP: GG Cheese!
  
  Dang, thanks for doing that math! That's super interesting.
- Wait until you find out 0,99... (repeating nines forever) equals 1

I had a $55.55 grocery run a few days ago.
If grocery bill totals were slot machines, we'd have way more fun buying groceries 😂

Anything other than the numbers 5 or 10 in the last digits place should be illegal for things other than gas.

Side question. If the return credit doesn't include discounts, don't you get more credit than you paid earlier? How does that make sense?
- If it's a single-use discount or coupon, you won't be able to use it again even if you return it.

- They're oatmeal raisin from the bakery. They're pretty good.

Finally an interesting subject