You’re nearly there now – just one more step in the next section to finally work out the DIY cost.
Activity 10 The price of doing it yourself
Now work out the DIY cost using all the information you’ve gathered and worked out.
- Each roll costs £15.
- There is a ‘three-for-two’ special offer.
- I will also need to buy some safety equipment costing £40.
- I need to buy 20 rolls of insulation.
Since I need to buy 20 rolls of insulation, I will be able to take advantage of the ‘three-for-two’ offer. So for every three rolls I purchase, I only pay for two rolls.
So cost of three rolls = £15 × 2 = £30
To determine how many times I will get to take advantage of the offer, a picture can be used.
Since there are six sets of three rolls, it will cost £30 × 6 = £180. Unfortunately, the two additional rolls won’t be on offer, so the insulation will cost £180 + £15 + £15 = £210.
Finally, the safety equipment is £40. This puts the total cost at £210 + £40 = £250
You can now move onto the final step in the problem solving cycle – interpreting the answer