the cheap dresses were $15 and the more expensive ones were $50 on saturday the store took in $550 and sold 25 more cheap dresses than expensive dresses how many dresses of each type did the store sell

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)