Health ministry authorities are planning to purchase COVID vaccines. The data available are as of December 1, 2021. The population eligible for vaccines is 8,500,000 people, of which 64% have already been vaccinated, with the rest still missing. Population growth is estimated at 7.5% with quarterly capitalization. There are still vaccines for the remaining 22% who are not vaccinated. Therefore, how many vaccines will the ministry have to purchase by the end of 2023 for 100% of the population to be vaccinated?