Q9. A company is producing tablet PCs. They figure that the general cost of operating the machines for a whole day is $2500, regardless of how many tablets they make that day. In addition to this, they figure that each tablet will cost about $700 to make and selling price is $1200 for each tablet.

1. Write the cost, revenue, and profit functions.
2. What profit (or loss) results from the sale of 20 tablets?
3. How many tablets should be sold in order to break even?