The cost of packaging of the oranges is 20 the cost of fresh oranges themselves The cost of oranges ...........

Explanation:

Let initial Cost of fresh, oranges = 100. 
packaging cost = 20. 
Initial total cost = 100 + 20 = 120 
After increasing in cost of fresh mangoes 30%, 
Cost of fresh mangoes = 130 And cost of packing go down by 50 % 
so,Cost of packing = 10. 
Total cost = 130 + 10 = 140. 
Increased cost = 140 – 120 = 20. 
% increased = (20*100) /120 = 16.66%