I need help to solve this question with proper explanation so that I can understand.

Suppose you start a business of manufacturing computer software. Assume that this computer software company is a perfectly competitive firm. Your fixed cost per month is Tk. 60,000 and total cost is Tk. 140,000. If you sell 1000 software per month and the average revenue is Tk. 70, what should be your short-run decision regarding shut down and long run decision regarding exit?