Hi Anton,

Try this:

var InMemoryOrderGroup = new InMemoryOrderGroup(cart);
var rewardDescription = InMemoryOrderGroup.ApplyDiscounts(_promotionEngine, new PromotionEngineSettings(RequestFulfillmentStatus.Fulfilled, true));

This will copy you cart to an in memory one. Combined with the PromotionEngineSettings you'll be able to see what discount is being applied.

You can get the placed price and the discounted price from the rewardDescription OR the InMemoryOrderGroup from the code above.

This is how you can do it

        public IEnumerable<RewardDescription> Evaluate(IEnumerable<ContentReference> entryLinks,
            IMarket market,
            Currency currency,
            string couponCode,
            RequestFulfillmentStatus requestFulfillmentStatus)
        {
            Validator.ThrowIfNull("entryLinks", entryLinks);
            Validator.ThrowIfNull("market", market);

            var rewardDescriptions = new List<RewardDescription>();
            var promotionEngineSettings = new PromotionEngineSettings() { ApplyReward = false, RequestedStatuses = requestFulfillmentStatus };

            foreach (var entryLink in entryLinks)
            {
                var orderGroup = _promotionEngineContentLoader.CreateInMemoryOrderGroup(entryLink, market, currency);
                orderGroup.Forms.First().CouponCodes.Add(couponCode);
                var entryLinkRewardDescriptions = _promotionEngine.Run(orderGroup, promotionEngineSettings);
                rewardDescriptions.AddRange(entryLinkRewardDescriptions);
            }

            return rewardDescriptions;
        }