Question

First 100 units 24p per unit

Remaining units 16p
Mrs watt checks her electricity bill here are her meter readings.
New reading: 7143
Old reading: 6997
A)Use subtraction to calculate the number of units used

B)Calculate the cost of the number of units used

Answer 1

Answer: a) 146 units used b) the cost of the number of units used is 3136 p.

Explanation: