Answer: Year 6
Explanation:
The Company is required to use the Accrual method when the average gross receipts become greater than $25 million.
Year 1 Average = $22.50 million
Year 2 Average = (22.5 + 24.5) / 2 = $23.5 million
Year 3 Average = (22.5 + 24.5 + 26.5) / 3 = $24.5 million
Year 4 Average = (22.5 + 24.5 + 26.5 + 25) / 4 = $24.625 million
Year 5 Average = (22.5 + 24.5 + 26.5 + 25 + 25.50) / 5 = $24.80 million
Year 6 Average = (22.5 + 24.5 + 26.5 + 25 + 25.50 + 27.50) / 6 = $25.5 million
Average gross income crosses the $25 million limit in Year 6 so the company will have to start using the Accrual method from Year 6.