DDD Domain Service vs Domain Factory vs. Double Dispatch

Offer_v1.php

<?php

class DormerOffer
{    
    /**
     * DormerOffer constructor.
     * @param OfferId $anId
     * @param OfferTitle $aTitle
     * @param DormerCalculation $aDormerCalculation
     * @param $chargeRates
     * @param PricesCalculator $pricesCalculator
     */
    public function __construct(
        OfferId $anId, OfferTitle $aTitle, DormerCalculation $aDormerCalculation,
        $chargeRates, PricesCalculator $pricesCalculator
    )
    {
        $this->id = $anId;
        $this->dormerCalculationId = $aDormerCalculation->calculationId();
        $this->title = $aTitle;
        $this->chargeRates = $chargeRates;

        // Calculate prices
        $prices = $pricesCalculator->calculate($aDormerCalculation, $chargeRates);
        $this->setPrices($prices);
    }
}

Offer_v2.php

<?php

class DormerOffer
{    
    /**
     * DormerOffer constructor.
     * @param OfferId $anId
     * @param OfferTitle $aTitle
     * @param DormerCalculation $aDormerCalculation
     * @param $chargeRates
     * @param $prices
     * @param PricesCalculator $pricesCalculator
     */
    public function __construct(
        OfferId $anId, OfferTitle $aTitle, DormerCalculation $aDormerCalculation,
        $chargeRates, $prices
    )
    {
        $this->id = $anId;
        $this->dormerCalculationId = $aDormerCalculation->calculationId();
        $this->title = $aTitle;
        $this->chargeRates = $chargeRates;
        $this->setPrices($prices);
    }
}

OfferFactory_v1.php

<?php

final class OfferFactory
{
    /** @var ChargeRatesFactory $chargeRatesFactory */
    private $chargeRatesFactory;

    /** @var PricesCalculator $pricesCalculator */
    private $pricesCalculator;

    /**
     * OfferPriceCalculator constructor.
     * @param ChargeRatesFactory $chargeRatesFactory
     * @param PricesCalculator $pricesCalculator
     */
    public function __construct(ChargeRatesFactory $chargeRatesFactory, PricesCalculator $pricesCalculator)
    {
        $this->chargeRatesFactory = $chargeRatesFactory;
        $this->pricesCalculator = $pricesCalculator;
    }

    /**
     * @param OfferId $offerId
     * @param DormerCalculation $calculation
     * @return DormerOffer
     */
    public function withDormerCalculation(OfferId $offerId, DormerCalculation $calculation): DormerOffer
    {
        $chargeRates = $this->chargeRatesFactory->init($calculation);

        return new DormerOffer(
            $offerId,
            OfferTitle::fromDormerCalculation($calculation),
            $calculation, $chargeRates, $this->pricesCalculator
        );
    }
}

OfferFactory_v2.php

<?php

final class OfferFactory
{
    /** @var ChargeRatesFactory $chargeRatesFactory */
    private $chargeRatesFactory;

    /** @var PricesCalculator $pricesCalculator */
    private $pricesCalculator;

    /**
     * OfferPriceCalculator constructor.
     * @param ChargeRatesFactory $chargeRatesFactory
     * @param PricesCalculator $pricesCalculator
     */
    public function __construct(ChargeRatesFactory $chargeRatesFactory, PricesCalculator $pricesCalculator)
    {
        $this->chargeRatesFactory = $chargeRatesFactory;
        $this->pricesCalculator = $pricesCalculator;
    }

    /**
     * @param OfferId $offerId
     * @param DormerCalculation $calculation
     * @return DormerOffer
     */
    public function withDormerCalculation(OfferId $offerId, DormerCalculation $calculation): DormerOffer
    {
        $chargeRates = $this->chargeRatesFactory->init($calculation);
        $prices = $this->pricesCalculator->calculate($calculation, $chargeRates);

        return new DormerOffer(
            $offerId,
            OfferTitle::fromDormerCalculation($calculation),
            $calculation, $chargeRates, $prices
        );
    }
}

The constructor reveives a domain service pricesCalculator which needs to make some complex calculations. But no calls to the external world e.g. a repository. But it requires the DormerCalculation Entity.
This entity itself is only required for the calculation and is NOT added to the aggregate root DormerOffer.