of Clustered Data Thai investors are classified into three clusters using investment proportions (Proportions of their money allocated to each investment type) Cash Holder 444 20% Old-Fashioned 1,573

allocated to each investment type e.g. cash deposit, stock market, real estate, gold, TFEX, and T-bond) as clustering variables. Three investor clusters are uncovered, namely, cash holders, old-fashioned

. Notwithstanding, the market volume of Thai vitamin C drink appeared to enjoy a pleasant growth rate Revenue from sales by product group Unit: THB million 2019 % 2020 % Amount Percent Branded products by our own

channel to communicate with the customers promptly as well as to increase pleasant level and top impression for keep maintain the existing customer base together with the increase of new customers. ▪ Risks