The prices (in ₹) of vegetables (per 5 kg) in the years 2019 and 2020 are as follows:
2019: 60 (Potato); 70 (Onion); 40 (Tomato); 30 (Chilli)
2020: 70 (Potato); 60 (Onion); 48 (Tomato); 27 (Chilli)
By the simple aggregative method, the net price changes in percentage are:

A

net decrease of 2% in price

B

net increase of 2% in price

C

net decrease of 2.5% in price

D

net increase of 2.5% in price