Final answer:
Aiden may deduct a maximum of a) $60,000 under the election to expense.
Step-by-step explanation:
The maximum amount that Aiden may deduct under the election to expense is $60,000. This is because under the tax law, businesses can deduct the full cost of qualifying property in the year it is placed in service, up to a certain limit. In this case, Aiden purchased $60,000 of construction equipment, which falls under the category of seven-year property. Therefore, he can deduct the entire $60,000 amount.