Explanation:
a. cost of one chocolate bar=?
cost of two chocolate bars= 4.90
To find the cost of one bar= 4.90/2
=2.45
therefore the cost of one bar= £2.45
B. total amount spent= 4.90+3.30
=8.2
therefore Simon spent £8.2 in total.
C. money left= total amount- total amount spent
=12.90-8.2
=4.7
therefore simon has £4.7 left.
D. 1 chocolate bar=2.45
7 chocolate bars=?
=2.45×7
=17.5
therefore melissa spent £17.15