Manny buys 4 boxes of straws for his restaurant. there are 500 straws in each box. how many straws does he buy?

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.