Answer Happy

I want to know how to do Questions F G
H.
Water
Food
Clothes
Price
Quantity
Price
Quantity
Price
Quantity
2013
2.00
100
5.00
90
10.00
150
2014
2.00
150
6.00
90
12.00
125
2015
3.00
150
7.00
110
12.00
150
2013: (2.00×100) +( 5.00×90) + (10.00
×150)= $2150
2014: (2.00×150) + ( 6.00×90) + (12.00
× 150)=$2340
2015: (3.00×150) + ( 7.00 ×110)+
(12.00 ×150)=$3020
2013: (3×100) +(7×90) +(12×150)
=$2730
2014: (3×150) +(7×90) +(12×125)
=$2580
2015: (3×150) +(7×110) +(12×150)
=$3020
(3020-2340)÷2340×100=29.06%
(3020-2580)÷2580×100= 17.05%