A small coffee shop administered a survey to 17 customers. Here are the results of thesurvey:

7

2

4

2

10

1

7

0

3

10

2

0

6

9

3

4

8

Compute the net promoter score for the coffee shop.

The net promoter score(NPS) for the coffee shop is

nothing

. (Enter your response as a whole number and include a minus sign if necessary.)