Task 19 - Computerised accounting system Using the MYOB data file and instructions provided complete the following: a) Produce a GST accrual summary report for 1/7/18 to 30/09/18. Save this report in a PDF, and submit with your assessment. b) From the GST accrual summary report, determine the net GST payable for 1/7/18 to 30/09/18. Task 20 - Lodging Activity Statement @) Explain what a registered BAS agent must obtain from their client each time they lodge an activity statement on behalf of a client? Your answer should be between 10 and 20 words. b) What authority does the primary contact have? Your answer should be between 30 and 40 words. c) List the ATO's preferred four channels for lodgement of activity statements. Your answer should be between 10 and 20 words