Exam PRINCE2-Practitioner topic 6 question 8 discussion

The Sales Director would like to add a new company logo to the 'marketing material'. The change to the project scope has been approved by the project board. It is expected to delay product and stage completion date by 3 days and cost ֲ£900. The stage 2 cost tolerance of +ֲ£1,000 has not been used. The change budget of
ֲ£500 has not been used.
Which option describes how this change should be funded?