Final answer:
The annual depreciation for the building prior to adjustment at the end of the fiscal year using the straight-line method is $2.25 million.
Step-by-step explanation:
The annual depreciation for the building prior to adjustment at the end of the fiscal year using the straight-line method can be calculated as follows:
Initial value of the building = $15 million
Depreciation rate = 15%
Depreciation expense = Initial value of the building × Depreciation rate
Annual depreciation = Depreciation expense = $15 million × 15% = $2.25 million
Therefore, the annual depreciation for the building prior to adjustment at the end of the fiscal year using the straight-line method is $2.25 million.