THE ONE WHO MAKES IT DOES NOT NEED IT THE ONE WHO BUYS IT DOES NOT USE IT AND THE ONE WHO U RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Look at debits and credits from his wallet:
buy Firework: -60
sell Firework: +70
buy Firework: -80
sell Firework: +90
+20

He profited $20 Did you answer this riddle correctly?
YES  NO  

It's his grandma Did you answer this riddle correctly?
YES  NO  

A stamp. Did you answer this riddle correctly?
YES  NO  

He made $20. $10 the first time, $70 - $60 = $10, and $10 the second time, $90 - $80 = $10, for a total of $20. Did you answer this riddle correctly?
YES  NO  

Be patient. Did you answer this riddle correctly?
YES  NO  

Time Did you answer this riddle correctly?
YES  NO  

Because the Uber driver was walking. Did you answer this riddle correctly?
YES  NO  

Owl-gebra Did you answer this riddle correctly?
YES  NO  

Because it already had a million degrees! Did you answer this riddle correctly?
YES  NO  

It didn't even rain. Did you answer this riddle correctly?
YES  NO  

A phone. Did you answer this riddle correctly?
YES  NO  

A cheetah. Did you answer this riddle correctly?
YES  NO  

A drop of water. Did you answer this riddle correctly?
YES  NO  

Time Did you answer this riddle correctly?
YES  NO  

Time Did you answer this riddle correctly?
YES  NO