Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Lucy lost one-third of her money. She then spent one-fourth of the remainder, and only left with $15. How much money did Lucy have at the beginning?

### Response:
Lucy has $60 because 15 x 4 = <<15*4=60>>60
Lucy had $90 because 60 x 1.5 = <<60*1.5=90>>90
Lucy lost $30 because 90 - 60 = <<90-60=30>>30
#### 30