Explain how to solve this math problem: A charity organization's goal is to distribute 400 boxes of food to a community that was recently destroyed by a flood. Each box contains $80 worth of food and $165 worth of additional supplies such as toiletries and fresh linens. Then, an anonymous donor gives the organization 4 times the amount of money they had already spent, allowing them to pack many more boxes. How many boxes do they pack in total?