please solve with work!! much appreciated

Answer:
Step-by-step explanation:
=average(4.35 + 4.20 + 6.10 + 5.50) if you are doing it on Excel, otherwise, if doing by hand, (4.35 + 4.20 + 6.10 + 5.50)/4 since there are 4 items you are adding together.
20.15/4 = 5.0375
Not sure what decimal place you want to round to?