Solution and Explanation:
Computation of service years
Year Jim Paul Nancy Dave Kathy Total * Cost Amortization
2014 1 1 1 1 1 5 * 3000 15000
2015 1 1 1 1 1 5 * 3000 15000
2016 1 1 1 1 1 5 * 3000 15000
2017 1 1 1 1 4 * 3000 12000
2018 1 1 1 3 * 3000 9000
2019 1 1 2 * 3000 6000
72000
Future years of service
Jim 3
Paul 4
Nancy 5
Dave 6
Kathy 6
24