The estimated budget for this contract can be estimated based on the monthly water usage and the pricing table provided. The total estimated annual cost for the base year is approximately 5,400 * Unit Price (19-Liter) + 14,400 * Unit Price (600ml) + 4,800 * Unit Price (330ml) + 300 * Unit Price (Additional Bottle 19L). Since the unit prices are not provided, we can assume an average price for bottled water in Indonesia. The average price for a 19-liter bottle of water in Indonesia is around 20,000 - 50,000 IDR. The average price for a 600ml bottle of water is around 5,000 - 10,000 IDR. The average price for a 330ml bottle of water is around 3,000 - 6,000 IDR. The average price for an additional 19L bottle is around 10,000 - 20,000 IDR. Based on these prices, the estimated annual cost would be around 500,000,000 - 1,500,000,000 IDR. Since the contract is for up to three years, the total estimated budget would be around 1,500,000,000 - 4,500,000,000 IDR. Converting this to USD, the estimated budget would be around $100,000 - $300,000 per year, or $300,000 - $900,000 for the entire contract.