credit management

Dear All,

i have a customer with a credit master sheet contains open order value 65328.40 the analysis of this value is 41677.80 for the month 03.2011 and 23650.60 for 12.2011 but the sales order list for this customer in the 03.2011 contains only two rejected sales order so can you help me to find from where did the system get this value.

regards,