Multicurrency / Different prices

$currentRowPrices = array();
				$matches=array();
				foreach($prices as $price){
					if($price->price_product_id!=$element->product_id){
						continue;
					}
					if ( !empty( $price->price_site_id) && $price->price_site_id == '[unselected]') {
						$price->price_site_id = '';
					}

					if ( !isset( $matches[$price->price_min_quantity])) {
						$matches[$price->price_min_quantity]=$price;
					}elseif ( empty( $matches[$price->price_min_quantity]->price_site_id)) {
						$matches[$price->price_min_quantity]=$price;
					}elseif ( $matches[$price->price_min_quantity]->price_site_id == $price->price_site_id) {
						$matches[$price->price_min_quantity]=$price;
					}
					$currentRowPrices[]=$price;
				}
				if(empty($matches)&&!empty($currentRowPrices)){
					foreach($currentRowPrices as $price){
						if($price->price_currency_id==$main_currency){
							$matches[$price->price_min_quantity]=$price;
						}
					}
					if(empty($matches)){
						$match = array_pop($currentRowPrices);
						if(!empty($currentRowPrices)){
							foreach($currentRowPrices as $price){
								if($price->price_currency_id==$match->price_currency_id){
									$matches[$price->price_min_quantity]=$price;
								}
							}
						}
						$matches[]=$match;
					}
				}

$defaultCurrentRowPrices = array();
				$currentRowPrices = array();
				$matches=array();
				//get a list of the prices with the good currency and a list of prices in other currencies for the current product
				foreach($prices as $price){

					// Skip if the price is not for the current product
					if($price->price_product_id!=$element->product_id){
						continue;
					}
					$defaultCurrentRowPrices[]=$price;

					// Skip if the price is not for the current currency
					if($price->price_currency_id!=$currency_id) {
						continue;
					}

					if ( !empty( $price->price_site_id) && $price->price_site_id == '[unselected]') {
						$price->price_site_id = '';
					}

					if ( !isset( $matches[$price->price_min_quantity])) {
						// If a price is not already saved for this minimum quantity, save it
						$matches[$price->price_min_quantity]=$price;
					}elseif ( empty( $matches[$price->price_min_quantity]->price_site_id)) {
						// Otherwise, when a default price is present, it can be replaced by another default (lower) price or specific site ID price
						$matches[$price->price_min_quantity]=$price;
					}elseif ( $matches[$price->price_min_quantity]->price_site_id == $price->price_site_id) {
						// Finally, when the SAME "Site" price is present, then replace it with the lower price (as the prices are sorted in DESC order)
						$matches[$price->price_min_quantity]=$price;
					}
					$currentRowPrices[]=$price;
				}
				// When no price is selected for the currency
				if ( empty( $currentRowPrices) && !empty( $defaultCurrentRowPrices)) {
					// Then use the default one to allow currency conversion.
					$currentRowPrices = $defaultCurrentRowPrices;
				}
				//if we didn't found any prices in the good currency we choose another currency (the main one preferably) and use the prices in this currency
				if(empty($matches)&&!empty($currentRowPrices)){
					foreach($currentRowPrices as $price){
						if($price->price_currency_id==$main_currency){
							$matches[$price->price_min_quantity]=$price;
						}
					}
					if(empty($matches)){
						$match = array_pop($currentRowPrices);
						if(!empty($currentRowPrices)){
							foreach($currentRowPrices as $price){
								if($price->price_currency_id==$match->price_currency_id){
									$matches[$price->price_min_quantity]=$price;
								}
							}
						}
						$matches[]=$match;
					}
				}