General ledger account

SUGGESTED

I am seeing in my cost of sales account in the general ledger report amounts that are unknown for only 1 company from the month of July to October. Usually any invoice that is paid goes into cash receipts report but those particular invoices are only showing up in the cost of sales report in general ledger and not in cash receipts report.  Is there a reason for this. Have never had this issue before in all the years have used sage 50. This is the first year I see it showing in my 2018 general ledger