The year-end of Mbuzana Traders, a business entity owned by Mr Zulu, is 31 December. On 1 January 2021, the statement received from the municipality showed that the company had overpaid by R2 500. Mbuzana Traders received electricity accounts for the four quarters starting 1 January 2021 and ending 31 December 2021 for R3 500, R3 570, R2 750 and R3 000 respectively. On 31 December 2021, the municipal account reflected a balance of R2 000 owing. Which one of the following alternatives represents the correct amount that must be disclosed as electricity expense in the statement of profit or loss and other comprehensive income of Mbuzana Traders for the year ended 31 December 2021?

a.R 8 500

b.R17 500

c.R13 500

d.R12 500

e.R17 320