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skeeter_ca
09-28-2013, 05:34 PM
How do you calculate the best deal on chlorine? If I know the % of chlorine and cost per gallon how do I determine what is the best buy. Here are a few example prices to figure on. 6% @ $1.99, 8.25% @ $2.49, 10% @ $3.75.

skeeter

mas985
09-28-2013, 08:17 PM
The cost of the actual chlorine per oz is:

Cost/Oz CL = Price / (Jug oz * Concentration)

so for each of those

$1.99 / (128 *0.06) = $0.26/oz
$2.49 / (128 *0.0825) = $0.24/oz <-- Best Deal
$3.75 / (128 *0.10) = $0.29/oz

This will work for non-standard jug sizes too.

skeeter_ca
09-28-2013, 10:49 PM
Thanks, works for me!

skeeter

Themadczar
09-30-2013, 12:06 AM
To simplify the calculation in the store on a phone or calculator... It's price / oz / %
So to use the previous example... $2.49 / 128 / .0825 = $0.24/oz
And as long as price is first, it doesn't matter which order you divide the other two variables.