The following spreadsheet shows demand and booking data for Toretto Car Rentals. Use the spreadsheet to answer the question$($s$)$ below.

A

B

$1$

Toretto Car Rentals

$2$

$3$

Data

$4$

$5$

Cars available

$80$

$6$

Price

$$40$

$7$

Overbooking cost

$$25$

$8$

$9$

Model

$10$

$11$

Reservation limit

$80$

$12$

Customer demand

$70$

$13$

Reservations made

$14$

Cancellations

$15$

$15$

Customer arrivals

$16$

Overbooked customers

$17$

$18$

Net revenue

What is the total number of overbooked customers?