The population of a city decreases by 4.6% per year. If this year's population is 329,000, what will next year's population be, to the nearest individual?

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done