/**
* Given a store price that includes tax at the store rate, this function will back out the store's tax, and add in
* the customer's tax. Returns this new price which is the customer's price including tax.
*
* @param float $storePriceInclTax
* @param float $storeRate
* @param float $customerRate
* @return float
*/
protected function calculatePriceInclTax($storePriceInclTax, $storeRate, $customerRate)
{
$storeTax = $this->calculator->calcTaxAmount($storePriceInclTax, $storeRate, true, false);
$priceExclTax = $storePriceInclTax - $storeTax;
$customerTax = $this->calculator->calcTaxAmount($priceExclTax, $customerRate, false, false);
$customerPriceInclTax = $this->calculator->round($priceExclTax + $customerTax);
return $customerPriceInclTax;
}
