You are the coordinator of your town's mega ice cream sundae social this year, and it is your job to plan the capacity required to serve the customers of the social. Last year, you identified the bottleneck station as the sprinkle station. You made the following observations in regards to the sprinkle station.

"Overall, 889 cones went through the sprinkle station. (I would expect the same amount this year) There are 2 people working at the sprinkle station, both doing the same work at the same time. The people are working at the station for the duration of the social, 1 hour. It takes 12 seconds to process each cone and 10 seconds to set up for the next set of 10 cones."

Using this information, you would like to know how many more people you should plan to have at the sprinkle station this year to have a 20% capacity cushion. Enter response as whole number.

The CORRECT Answer is 3. How is this?