Final answer:
Gail can fully deduct the cost of the new asset ($21,000) and use the carryover ($10,000) for a total § 179 deduction of $31,000 in 2015, limited by her business income of $50,000.
Step-by-step explanation:
The student is asking about § 179 deduction, which pertains to the immediate expensing of business assets. In 2014, Gail had a $10,000 § 179 deduction carryover. In the subsequent year, she elected § 179 for an asset acquired at a cost of $21,000. Given Gail's § 179 business income limitation for 2015 is $50,000, we must determine Gail's § 179 deduction for that year.
According to the § 179 deduction rules, the total amount deducted under § 179 cannot exceed the taxpayer's business income. Since Gail's business income is $50,000 and her § 179 asset cost is $21,000, which is less than her business income, she can deduct the full cost of the asset. Additionally, Gail can use the carryover from 2014 which is $10,000 to further reduce her taxable business income, but only up to the business income limit.
Therefore, Gail's total § 179 deduction for 2015 will be the full cost of the new asset ($21,000) plus the carryover from the previous year ($10,000). However, since the total deduction for the § 179 cannot exceed her business income for the year, it's capped at her business income of $50,000. In conclusion, Gail's § 179 deduction for 2015 is $31,000 (which falls under option 3).