You are planning the audit of Bluechip Ltd, a company with investments in listed securities that you consider to have a low level of inherent risk. What is the most appropriate level of planning materiality for the 30 June 2022 audit given the following balances: (all amounts are in $'000)

Sales: 1240 (2022); 1116 (2021); 992 (2020)

Profit: 22 (2022); 180.4 (2021): -154 (2020)

Current assets: 1840 (2022); 1656 (2021); 1472 (2020)

a.

1.1

b.

18.4

c.

12.4

d.

2.2