fix #258

Author: abuzuhri

README.md

@@ -653,6 +653,22 @@ var def = amazonConnection.ProductType.GetDefinitionsProductType(
      locale = AmazonSpApiSDK.Models.ProductTypes.LocaleEnum.en_US
      });
 ```
+
+---
+## Sales Performance Sample
+
+```CSharp
+     DateTime queryStart = DateTime.UtcNow.AddDays(-11).Date;
+     DateTime queryEnd = DateTime.UtcNow;
+     var parameters = new ParameterGetOrderMetrics();
+     parameters.marketplaceIds = new MarketplaceIds();
+     parameters.marketplaceIds.Add(MarketPlace.UnitedArabEmirates.ID);
+     parameters.interval = queryStart.ToString("yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture) + "Z--" + queryEnd.ToString("yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture) + "Z";
+     parameters.granularity = Constants.GranularityEnum.Day;
+     parameters.firstDayOfWeek = Constants.FirstDayOfWeek.monday;
+
+     var sales = amazonConnection.Sales.GetOrderMetrics(parameters);
+```
 ---
 ## Q & A
 

Source/FikaAmazonAPI/AmazonSpApiSDK/Models/Sales/ModelDecimal.cs

@@ -34,7 +34,7 @@ public Money() { }
         /// </summary>
         /// <param name="CurrencyCode">Three-digit currency code. In ISO 4217 format. (required).</param>
         /// <param name="Amount">The currency amount. (required).</param>
-        public Money(string CurrencyCode = default(string), ModelDecimal Amount = default(ModelDecimal))
+        public Money(string CurrencyCode = default(string), decimal Amount = default(decimal))
         {
             // to ensure "CurrencyCode" is required (not null)
             if (CurrencyCode == null)
@@ -45,15 +45,6 @@ public Money() { }
             {
                 this.CurrencyCode = CurrencyCode;
             }
-            // to ensure "Amount" is required (not null)
-            if (Amount == null)
-            {
-                throw new InvalidDataException("Amount is a required property for Money and cannot be null");
-            }
-            else
-            {
-                this.Amount = Amount;
-            }
         }
 
         /// <summary>
@@ -68,7 +59,7 @@ public Money() { }
         /// </summary>
         /// <value>The currency amount.</value>
         [DataMember(Name = "amount", EmitDefaultValue = false)]
-        public ModelDecimal Amount { get; set; }
+        public decimal Amount { get; set; }
 
         /// <summary>
         /// Returns the string presentation of the object

Source/FikaAmazonAPI/AmazonSpApiSDK/Models/Sales/Money.cs

@@ -142,8 +142,8 @@ public enum FeedType
         [JsonConverter(typeof(StringEnumConverter))]
         public enum FirstDayOfWeek
         {
-            Monday,
-            Sunday
+            monday,
+            sunday
         }
 
         [JsonConverter(typeof(StringEnumConverter))]
@@ -170,7 +170,7 @@ public enum NotificationType
             PRODUCT_TYPE_DEFINITIONS_CHANGE,
             ORDER_STATUS_CHANGE,
             PRICING_HEALTH
-            
+
         }
 
         /// <summary>