###Human: Michael has $50. He wants to surprise his mom on Mother's day by buying a cake for $20, a bouquet for $36, and a set of balloons for $5. How much more money does Michael need to buy all those?, ### Assistant: Michael will spend $20 + $36 + $5 = $61.
So, he needs $61 - $50 = $11 more to buy all those for his mom. 
 So the answer is :  11