Numeracy Intermediate June 2023 Unit 1 Q4
4. Alice used 400 kWh of electricity.
Electricity was charged at 32p per kWh.
The standing charge was £62.
VAT at 5% is payable on all the charges.
Calculate Alice’s electricity bill.
You must show all your working. [5]
| Scheme | Marks | Comments |
|---|---|---|
| Incorrect unit of money is penalised – 1 once only on the first occurrence, by withholding an A or B mark | ||
| (Electricity cost is) 400 ×(£)0.32 or 400 × 32(p) | M1 | |
| (£)128 or 12800(p) | A1 | Accept £128.00p |
| (All charges £128 + 62 =) (£)190 or 19000(p) | B1 | FT ‘their derived electricity cost’ provided ≠ 400 or (0.)32 May be seen or implied in further working Allow B1 for the correct evaluation of the sum of two resulting individual charges when VAT has been subtracted from either ‘their derived electricity cost’ or the standing charge, or from both, individually |
| (Total bill including VAT at 5%) (£)199.5(0) or 19950(p) | B2 | For B2, FT ‘their all charges’, accepting rounding or truncation to a penny, provided ‘their all charges’ is from attempted sum of electricity cost + standing charge For B1, FT for one of the following.
|