###Human: Leonard and his brother Michael bought presents for their father. Leonard bought a wallet at $50 and two pairs of sneakers at $100 each pair, while Michael bought a backpack at $100 and two pairs of jeans at $50 each pair. How much did they spend in all?, ### Assistant: Two pairs of sneakers cost 2 x $100 = $200.
So, Leonard spent $50 + $200 = $250.
Two pairs of jeans cost 2 x $50 = $100.
Thus, Michael spent $100 + $100 = $200.
Therefore, they spent a total of $250 + $200 = $450 in all. 
 So the answer is :  450