This is a compatibility issue with Mac OS Yosemite. I Updated the tax rule in the code for you to fix the problem.
i changed:
function WAEC_Novagen_Cart_VAT() {
$totalTax = 0;
if (true && ((sizeof($this->Items) == 0))) {
$totalTax += ($this->TotalColumn("TotalPrice") * 14%);//Result
}
return WA_eCart_FormatNumber($totalTax, $this->ForceDecimalsC, $this->DecimalPlacesC);
}
to:
function WAEC_Novagen_Cart_VAT() {
$totalTax = 0;
if (true && ((sizeof($this->Items) > 0))) {
$totalTax += ($this->TotalColumn("TotalPrice") * 0.14);//Result
}
return WA_eCart_FormatNumber($totalTax, $this->ForceDecimalsC, $this->DecimalPlacesC);
}