I can't get this formula to work right so trying to find out what I'm doing wrong . I've attached the question and the formula I've come up with but Microsoft Excel wont accept it

In cell F27, use an IF function to calculate the discount amount for this order based on the

customer's status (which is found in F16 says Preferred). If the customer's status is Preferred, the discount amount will be the Order Subtotal ( 116.91 ) times the discount percentage 10%(B29 has the discount) otherwise the discount amount will be 0 (zero).Hint: You will need to use a formula for the Value if True argument

=IF("f16",F26*B29),0)

Please help