How to get the outcome of this to show the total plus 5%

[rossdpk]

Hi. I'm trying to get this script to show the total with 5% added on (tax).
The code i have here gets the total of the volume multiplied by the price but i can't seem to figure out how to then add 5% onto this total.....

var unitvalue=0

var dailyprice=0

function calculate(){
var litres=document.price.value
var selectunit=document.price.units.options[document.price.units.selectedIndex].value

if (selectunit=="300")
unitvalue=selectunit*0.5000
else if (selectunit=="500")
unitvalue=selectunit*0.4100
else if (selectunit=="600")
unitvalue=selectunit*0.4100
else if (selectunit=="700")
unitvalue=selectunit*0.4100
else if (selectunit=="900")
unitvalue=selectunit*0.4100
else if (selectunit=="1000")
unitvalue=selectunit*0.4100
else if (selectunit=="1200")
unitvalue=selectunit*0.4100
else if (selectunit=="1300")
unitvalue=selectunit*0.4100
else if (selectunit=="1800")
unitvalue=selectunit*0.4100
else if (selectunit=="2000")
unitvalue=selectunit*0.4050


alert (selectunit+" litres, including VAT, will cost:\n\n \u00A3"+unitvalue+"\n")
}

Any ideas anyone?
Thanks in advance,
Ross.

[acoder]

Adding 5% would be the same as multiplying by 1.05.

PS. if only VAT were indeed 5%! ;)

[rossdpk]

Adding 5% would be the same as multiplying by 1.05.

PS. if only VAT were indeed 5%! ;)

Thanks for your reply!
Any idea where in the code would I need to put the multiplication?

[rossdpk]

Thanks for your reply!
Any idea where in the code would I need to put the multiplication?

Ah, ok. I got it working now. As expected, it was quite a simple problem to solve. But man, thats had me frustrated for ages!
Now to get it to round up to 2 decimels!!!
Thanks acoder!

[rossdpk]

Actually, could anyone help with getting this to round the total up to 2 decimal places?

I know i'm a bit rubbish at this but i'm more a designer than developer!

Thanks.

[JKing]

var total;

total = 25.6349;

total = total.toFixed(2);

[rossdpk]

var total;

total = 25.6349;

total = total.toFixed(2);

I've been trying similar things to that but how and where does that fit into my code?

[JKing]

You want to round it after all calculations are finished.

total = total.toFixed(2);

Place that after all calculations are done and replace total with the name of your variable.

[rossdpk]

You want to round it after all calculations are finished.

total = total.toFixed(2);

Place that after all calculations are done and replace total with the name of your variable.

Hi, i've tried putting [unitvalue = unitvalue.toFix ed(2);] after the calculations, and in different parts of the code but it still wont give the total as 2 decimel places. Any ideas?

[rossdpk]

Hi, i've tried putting [unitvalue = unitvalue.toFix ed(2);] after the calculations, and in different parts of the code but it still wont give the total as 2 decimel places. Any ideas?

Got it working!!!
Thanks everyone for your help!