Nottingham Financial purchases computer parts from its suppliers 2/10, net 60. However, Nottingham routinely stretches accounts payable 10 days beyond the due date. What is the effective annual cost...

Nottingham Financial purchases computer parts from its suppliers 2/10, net 60.  However, Nottingham routinely stretches accounts payable 10 days beyond the due date. What is the effective annual cost of not taking the trade discount?  How much does the account stretching reduce the cost of not taking the trade discount?