Answer:
B: -1.94
Explanation:
First, you would want to multiply 6 and 6.99
You should get 41.94.
Finally, subtract 41.94 with 40.00. (41.94-40.00).
You should get -1.94. The reason why we add a negative sign is because the total cost of the 6 bikes is more then what she payed with.