FM L1.18 Calculate simple interest in multiples of 5% on amounts of money

Sparked after reading an article about a UK Which? report in The Guardian newspaper, and made in haste, this resource is aimed at Entry Level 3 (E3) and Level 1 (L1) learners but includes some E1-2 and L2 questions. There is no answer sheet – one might appear later for skillsworkshop contributors – but the teaching notes do include general marking guidance. 

Level
E3
L1
L2
Maths
FM Simple one step problem(s)
FM Straightforward problem(s) with more than 1 step
FM L1.16 Recognise and calculate equivalences between common fractions, percentages and decimals
FM E3.10 Calculate with money using decimal notation & express money correctly in writing in pounds and pence
FM E3.11 Round amounts of money to the nearest £1 or 10p
FM L1.18 Calculate simple interest in multiples of 5% on amounts of money
FM L1.29 Find the mean and range of a set of quantities
FM L2.23 Calculate the median and mode of a set of quantities
Context
Catering Food Nutrition