Plsss someone help me asappp

Which of the following best explains why the game of economics does not have a single goal

Micheal wants to estimate how much it will cost him each month to own and maintain his car. which of the following costs should not be included in the calculations? routine maintenance? dealer fees? gas? loan payments? wouldn't it be dealer fees? ? idk in advance! : )

Which of the following is a correct conversion factor? select one: 1 kg = 1,000 g 1,000 m = 1 mm 100 ml = 10 mm 1 l = 100 g