By the end of 2018, Bill retired after 30 years of participation in his employer's pension plan. The pension plan provides a benefit based on 1.8% of his best earnings over four consecutive years. Bill's career has progressed steadily with his promotion six years ago having caused a substantial jump in his earnings. Given the following earnings history, calculate Bill's annual pension. 2013 ~ $60,000 2014 ~ $65,000 2015 ~ $70,000 2016 ~ $75,000 2017 ~ $71,000 2018 ~ $60,000 Question 15 options:

$32,400

$37,260

$37,935

$42,150