Before getting to school, Keith has a few errands to run. Keith has to walk 5 blocks to the library, and 8 blocks to the store, before walking the final 4 blocks to arrive at school. If Keith has already walked 10 blocks, how many more blocks must he walk before arriving at school?

Joan had 228 bear stickers. Joan gave 57 stickers to Benny, 67 stickers to her sister and an additional 36 stickers to Mary. How many stickers does Joan still have?