He stopped renting his cottage for $$3,500$ a year and used it as his factory. The market value of the cottage increased from $$70,000$ to $$71,000.$

He spent $$50,000$ on materials, phone, etc.

He leased machines for $$10,000$ a year.

He paid $$15,000$ in wages.

He used $$10,000$ from his savings account, which earns $5$ percent interest per year.

He borrowed $$40,000$ at $10$ percent a year.

He sold $$160,000$ worth of bodyboards.

Normal profit is $$25,000$ a year.

Calculate Lee's opportunity cost of production and his economic profit.

Lee's accountant recorded the depreciation on his cottage during $2017$ as $$7,000.$ According to the accountant, what profit did Lee make?