Upgrade Price Calculations

[mikelegg]

I didn't want to report this as a bug in case I've configured something incorrectly, but I'm finding that the WHMCS upgrade calculations are consistently wrong.

 

Here's an example of one I did today

 

Today's Date: 11th February 2011

Due Date: 11th August 2011

Days Left on Current Cycle: 182

 

Old Plan value: $49.00

New Plan value: $199.00

 

This is how the calculation is done according to http://wiki.whmcs.com/Automated_Upgrades_and_Downgrades

 

Credit on unused portion of old plan - ($49.00 / 365 days) x 182 days = $24.43

Debit for new plan - ($199.00 / 365 days) x 182 days = $99.22

Total Due today: $99.22 - $24.43 = $74.79

 

I agree that is what the correct amount should be, but WHMCS actually came up with a figure of $96.29 and I don't know why.

 

Has anyone else experienced this before?

[bear]

That looks like it took this:

Total Due today: $99.22 - $24.43

and had the second value with the wrong decimal place, perhaps.

99.22

-2.44

$96.78

[mikelegg]

That looks like it took this:

Total Due today: $99.22 - $24.43

and had the second value with the wrong decimal place, perhaps.

99.22

-2.44

$96.78

 

I like the way you're thinking, but it doesn't quite equal the $96.29 figure that WHMCS came up with.

 

I'll try a few similar scenarios and see what I can come up with.

[mikelegg]

I worked it out - it was my fault - I wasn't selecting Annual Billing Cycle so it was calculating using the monthly cycle which screwed up the results .

 

When I select the Annual Billing Cycle it works perfectly.