enter/calculate price more digit behind the comma

[pat123]

The prices I enter are BTW-included prices (2 digits) but the system automatically calculates the net-price with also 2 digits (although 3 or 4 are sometimesneeded)

So can I change this ?

- or disable the auto-calculation of net-prices

- or possibility thaqt prices are entered with 3-digits (and if needed used for further calculation

 

F.e. when I enter a taks-included price (21%) of 4.70 , the net-price is 3.884297521 (for ease 3.885 )

The system reduces this to 3.88 and displays the price as attach. (a "fake"-pricerule )

However if I enter 4.71 ( which is net : 3.89256 or 3.89) the "fake"-rule is not there.

 

Or does the system has a problem with rounding of ? (3.8849 : fourth digit is 9 so 3.885 and then ??? to go to a 2-digit number)

[stottycabanas]

Hi Pat, just for info: the standard method of rounding to 2 decimal places involves adding 0.005 to the pre-rounded number and then truncating the result after 2 decimal places. In your example the 4th digit is irrelevant.

Cheers, Dave

[pat123]

Daar ben ik niet mee akkoord want dit is niet de wijz waarop afronden gebeurt :

bv (zie Wikipedia)

pi (3,141592654...) afronden op:

• 2 cijfers na de komma: 3,14 (want op de 4 volgt een 1)
• 3 cijfers na de komma: 3,142 (want op de 1 volgt een 5 → de 1 verhogen tot 2)

1,7995 afronden op:

• 2 cijfers na de komma: 1,80
• 3 cijfers na de komma: 1,800

-1,235 afronden op:

• 2 cijfers achter de komma: -1,24

 

Gebruiken we de prestashop-manier van afronden op pi :

3,141592654 ++ 0.005 = 3.146... dus cijfer 3 is een 6 => 3.15

 

Dus pi is opeens 3.15 !!!!

Daar ben ik niet mee akkoord want dit is niet de wijz waarop afronden gebeurt :

bv (zie Wikipedia)

pi (3,141592654...) afronden op:

• 2 cijfers na de komma: 3,14 (want op de 4 volgt een 1)
• 3 cijfers na de komma: 3,142 (want op de 1 volgt een 5 → de 1 verhogen tot 2)

1,7995 afronden op:

• 2 cijfers na de komma: 1,80
• 3 cijfers na de komma: 1,800

-1,235 afronden op:

• 2 cijfers achter de komma: -1,24

 

Gebruiken we de prestashop-manier van afronden op pi :

3,141592654 ++ 0.005 = 3.146... dus cijfer 3 is een 6 => 3.15

 

Dus pi is opeens 3.15 !!!!

Dus het derde cijfer is wel relevant

[stottycabanas]

Absoluut niet! Terug naar het Engels.

Your example with pi involved 2 rounding steps, not one. You cannot say that because pi to 3 d.p. is 3.146 and 3.146 to 2 d.p is 3.15, therefore pi to 2 d.p. is 3.15. It just doesn't work like that.

I knew my maths degree would come in handy one day.

mvg, Dave

 

Edit - for clarity, 3.141592654 + 0.005 = 3.146592654. Then truncate after 2 d.p. (i.e. no further rounding), to get 3.14. Wikipedia is correct, but I'm afraid you are not.

Edited February 7, 2014 by stottycabanas (see edit history)

[pat123]

OK, I made a mistake (I am not a math-specialist, you apparently are)

 

But how do you explain the "fake"-pricerules I have.

As you can see in file 4.70.jpg the 4.70 price is striked through as if a price-)rule (involving 0% discount) is valid. this is not the case when the price is 4.71 (4.71.jpg)

 

And for the record there is no special price for this product (see prijsregel.jpg)

[stottycabanas]

Pat, I can't explain that off the top of my head, but I notice you had this strikethrough problem before in a thread you've marked as solved:

http://www.prestashop.com/forums/topic/306375-solved-price-strike-through-although-not-in-promotion/

Is it possible to apply the same solution as before?

Cheers, Dave