Answer:
£15.20
Step-by-step explanation:
You want to get 73 pencils in the cheapest way possible and the way to do it is by buying 7 10-pack pencils and 3 singular pencils.
A packet of 10 pencils is worth £2. We want 7 of them so you multiply £2 by 7 which equals £14
We now need 3 more pencils but we can't have a part of a packet as that's not possible so we need to buy individual pencils. The cost of a singular pencil is 40p and we need 3 of them so you multiply 40p by 3 which gives £1.20(given in pounds).
Finally, you add £14 (which was the cost of the 7 packets) to £1.20(the cost of the individual pencils) which results as £15.20 and that's the lowest amount he can pay in pounds.
Hope this helps.
