Those using the Sales Order area in SalesLogix have likely run into a bug where applying discounts causes the Sales order total to calculate incorrectly.  Today I am going to describe the problem and how to fix it.

First lets take a look at what is going on.

Lets say we add a single line item to our Sales order that has a sell price of $399.00.  We enter a quantity of 50.  The extended price of the line item shows correctly as $19950.00.  The Sales Order total also correctly reflects Now lets say we want to discount the selling price to be $100.00 each so we enter $100.00 in the Adjusted Price column.  The line item we have now added an discount adjustment of 74.97%.  The extended price of the line item now shows correctly as $5000.00.  But look at the Sales Order total, it now shows $4999.47

 What happened?

Well, digging in a little we find that on the SalesOrderItem Entity events of OnBeforeUpdate, OnBeforeInsert, and OnBeforeDelete they are calling methods in the Sage.SalesLogix.BusinessRules.dll assembly, Looking at this assembly with Reflector we are able to find that a method is called from each of these events called "SetOrderTotal".  This event calls another event of "GetAdjustedPrice".  This method has the following code:

public static double GetAdjustedPrice(ISalesOrder salesOrder)
{
    double num = 0.0;
    foreach (ISalesOrderItem item in salesOrder.SalesOrderItems)
    {
        double num2 = (item.Price.HasValue && (item.Price.Value > 0.0)) ? item.Price.Value : ((item.CalculatedPrice.HasValue && (item.CalculatedPrice.Value > 0M)) ? Convert.ToDouble(item.CalculatedPrice.Value) : 0.0);
        if (item.Discount.HasValue)
        {
            double? quantity = item.Quantity;
            num += (num2 * (quantity.HasValue ? quantity.GetValueOrDefault() : 0.0)) * (1.0 - item.Discount.Value);
        }
        else
        {
            num += num2;
        }
    }
    return num;
}

Here we can see the problem inside the For Each loop.  It is using the item.Discount.Value multiplied by the original Sell Price and Quantity to determine the price of the item.  These items are the rolled up to return the Sales Order total.  The problem is that the Discount field is rounded to 2 decimal places.  When you do the math with our sample you see the results returned are $4999.47.  What it should use is just the Adjusted Price field instead of the rounded Adjustment field.

All of this code is inside a compiled Sage assembly so how do we modify it?  The answer is we don't.  What we can do is to add our own code to the Entities that will run after the base code does and correctly calculate our total.

First we create a new business rule at the Sales order level called FXSetOrderTotal.  Here is the code we can then use:

public static partial class SalesOrderBusinessRules
    {
        public static void FXSetOrderTotalStep( ISalesOrder salesorder)
        {
            if (!Sage.SalesLogix.SalesOrder.SalesOrderHelperClass.HasSynced(salesorder))
            {
                salesorder.OrderTotal = new double?(FXGetAdjustedPrice(salesorder));
            }
            Sage.SalesLogix.SalesOrder.SalesOrder.SetGrandTotal(salesorder);
        }
       
        public static double FXGetAdjustedPrice(ISalesOrder salesOrder)
        {
            double num = 0.0;
            foreach (ISalesOrderItem item in salesOrder.SalesOrderItems)
            {
                double num2 = item.CalculatedPrice.HasValue && (item.CalculatedPrice.Value > 0M) ? Convert.ToDouble(item.CalculatedPrice.Value) : ((item.Price.HasValue && (item.Price.Value > 0.0)) ? item.Price.Value : 0.0);
                num += (num2 * (item.Quantity.HasValue ? item.Quantity.GetValueOrDefault() : 0.0));
            }
            return num;
        }
    }

 Now with that rule established we can then add code to the Post execute event of each of the SalesOrderItem Entity events of OnBeforeUpdate, OnBeforeInsert, and OnBeforeDelete.

In the post execute step we simply then need to call:

salesorderitem.SalesOrder.FXSetOrderTotal();

Now the rounding issue will be gone!