31 When Brenda opened the invoice that arrived with the delivery of the office supplies order she was horrified when she saw that the total gross cost was $380.
Upon checking carefully, however, she realised that on the order form she had put a tick by
boxes of 12 pens instead of individual pens, but correctly entered the quantity required as 15.
She consoled herself that they would all get used eventually, and at least they were only $18 per
box whereas the individual pens would have cost $2 each. Further consolation came when she
read that customers ordering more than $200 worth of goods should deduct 10% from the total
gross cost.
When Brenda settles the invoice, how much more will she have spent than she intended?
A $202
B $213
C $216
D $232
E $243