You and your friend go shopping with $846,375,593. (that's literally the question) You spend 250,678 dollars on shoes, 10,008 dollars on clothes, and 40,034 dollars on accesories. How much money do you both have left? Later, your friend and you get robbed and the robber takes half of the remaining money. How much do you have left?

Later, you earn $234,485.78. How much do you and your friend now have?

This is the actual question on my homework... I have no clue how to do this... can someone please help me? 50 points!