Work Out Debtor Days Bundle Add to basket £1.50 inc VAT SKU: TK29 Category: Toolkits. Description Product Description Download our Work Out Debtor Days Bundle Today Work out your DSO, which stands for stands for Days Sales Outstanding, sometimes called Debtor Days. previousnext Related products Before Taking Legal Action Guide £1.50 inc VAT Commercial Credit Collection Letters £3.50 inc VAT Credit Control Working out Interest £1.00 inc VAT Credit Collection Letter 2 £1.00 inc VAT