(g) Waikato Limited files two monthly GST returns. On 8March 2018, the company applies to use the ratio option to work out its 2019 provisional tax. IRD approved this and review the companys latest returns, which are for the 2017year. The 2017 RIT is $180,000, and the total taxable supplies the year ended 31 March 2017 is $3,750,000. The companys taxable supplies for the year ended 31 March 2019 are as follows:

GST return period	Taxable supplies ($)
April - May 2018	800,000
June - July 2018	400,000
August - September 2018	350,000
October - November 2018	420,000
December 2014 - January 2019	640,000
February - March 2019	580,000

Calculate the ratio percentage and the provisional tax instalments for 2019 of Waikato Limited.