I bought 3 kg of walnuts at $5.60 per kg and 5 kg of almonds at 6.14 per kg. If I gave the cashier a $100 bill, how much money should I receive back?
The total cost of the walnuts is 3 kg * $5.60/kg = $<<3*5.60=16.80>>16.80
The total cost of the almonds is 5 kg * $6.14/kg = $<<5*6.14=30.70>>30.70
The total cost for all the nuts is $16.80 + $30.70 = $<<16.80+30.70=47.50>>47.50
Therefore, you should receive $100 - $47.50 = $<<100-47.50=52.50>>52.50 back. Answer: \boxed{52.50}.