tidy sum

Noun

• (often followed by `of') a large number or amount or extent
  • a batch of letters
    
  • a deal of trouble
    
  • a lot of money
    
  • he made a mint on the stock market
    
  • see the rest of the winners in our huge passel of photos
    
  • it must have cost plenty
    
  • a slew of journalists
    
  • a wad of money