John will be conducting a study on "The Association of the Entrepreneurial Self-Efficacy to Socio-Economic Characteristics of the Micro Entrepreneurs in the Province of Albay." Based on his coordination with the Department of Trade Industry, the total population of micro entrepreneurs is 2,000 of which 1,000 is engaged in retail, 500 in food processing, and the remaining 500 in agri-enteprises. What is the sample size if you will be using Slovin's formula with 99% level of confidence? (Write in numerical form ONLY) e.g. 123 *