Marvin's Rooms is a new business which started on January 1, 2020. Its sales during its first four quarters of operation were as follows: Quarter 1 2 3 4 Sales $13,000 18,000 24.000 27,000 On what date will Marvin's Rooms have to begin collecting GST? September 1, 2020 The date in the second quarter on which cumulative sales total 530.000 August 1, 2020 y 1, 2020