What is this guy's total earning over a 5-year period?

Question

Answer 1

year one 31,900

year two 2330+31,900 = 34,230

year 3: 4660 + 31,900 = 36,560

year 4 6990 + 31,900 = 38,890

year 5 9,320 + 31,900 = 41,220

total income for 5 years

= 31900 + 34230+35460+38890+ 41220

= $181,700