The first day of my internship, managing director introduced employees in the company that who worked in what position. The company has employees in offices around 6 people and has the general workers in garden almost 20 people. The first week he told me try to summarize the cash flow statement and sister who work as accountant come to teach me. She said we should try to summarize the cash flow in each month of this year, because managing director will not see details in each spot a little, but he will highlight the result look as one month or one-quarter, so we need to bring each revenue or expense that we recorded everything to calculate the total of revenue and expense in each month and continue to calculate the total in quarter.