Mary and Rose went shopping to buy presents. They spent the same amount. Mary bought two pairs of sunglasses for $50 each and a pair of jeans for $100.  Rose bought a pair of shoes at $150 and two decks of basketball cards. How much did one deck of basketball cards cost?
Mary and Rose went shopping to buy presents. They spent the same amount. Mary bought two pairs of sunglasses for $[AMOUNT] each and a pair of jeans for $[AMOUNT]. Rose bought a pair of shoes at $[AMOUNT] and two decks of basketball cards. How much did one deck of basketball cards cost?
Two pairs of sunglasses costs 2 x $50 = $<<2*50=100>>100.
So, Mary spent $100 + $100 = $<<100+100=200>>200.
Thus, two decks of basketball cards costs $200 - $150 = $<<200-150=50>>50.
Therefore, one deck of basketball cards costs $50/2 = $<<50/2=25>>25.
#### 25