Easy Riddles and Answers

Question: someone came into my shop and stole 100 dollars from the register without my knowledge. the person came back 5 minutes later with the same 100 dollars and bought 70 dollars in items and i gave him back 30 dollars change. How much did i lose?

Question: I move faster in certain solids, but slower in certain gases. I am typically broken by objects with large masses. I can be used as for pleasure, practice, and even an alarm. If used excessively, I can cause harm. What am I?

Question: What jumps when it walks and sits when it stands?

Question: Enter one hole and leave three,
once you succeed I'm on thee?

What am I?

Question: What's cheaper than gold, yet more valuable.Hard to find, but easy to loose