Answer:
40,000 ; 48100 ; 46000 ; 53000
Step-by-step explanation:
Year Current(A) Cost Index(B) base amount(A/B) change from prior year
2018 $40,000 1.00 40000 0
2019 56,100 1.20 46750 6750
2020 58,500 1.30 45000 (1750)
2021 70,000 1.40 50000 5000
Year 2018 = $40,000
Year 2019:
$40000 × 1.00 = $40,000
$6750 × 1.20 = 8100
$40,000 + 8100 = $48100
Year 2020:
$40000 × 1.00 = $40,000
($6750 - $1,750 = $5000) × 1.20 = $6,000
40000 + 6000 =$46000
Year 2021 :
$40,000 × 1.00 =$40,000
($6750 - $1750 = $5000) × 1.20 = $6000
$5000 × 1.40 = $7000
40000 + 6000 + 7000 =$53000