You speak to a business owner that is taking in almost $2,000 in revenue each month. the owner still says that they’re having trouble keeping the doors open. how can that be possible? use the terms revenue, expenses, and profit/loss in your answer.

Let's say for example that the business is taking in $2000 of revenue.  That is the amount that the business collected for it's services - like for fixing the computer.  What if though it costs $500 for the equipment (that's an expense).  Now they only made $1500.  Now the customer complains and says that the computer isn't fixed properly so the company sends out a techie for 2 additional hours.  They need to pay their employee (another expense).  Now the $1500 is down to $1400.  They would have utilities to keep their lights on and insurance and many other expenses.

Your profit looks like this:
Profit = Revenue - Expenses