Olivia filled 4 baskets of apples. Her friend filled up one additional basket of
apples. If all of the baskets sold for a total of $160, how much money did
each basket of apples cost?
Olivia filled 4 baskets of apples, and her friend filled one additional basket. So, there were 4 + 1 = <<4+1=5>>5 baskets in total.
If all of the baskets sold for a total of $160, the cost of each basket of apples is $160 / 5 = $<<160/5=32>>32. Answer: \boxed{32}.