Help with PPC case study

Hi there! Need some help understanding this. Unsure if I’m missing something or being dim here. Question is below

H&M are running a campaign that has the following performance:

CPC = 2.25 Conversion rate = 3%

They have a cost of sales (COS) target of 30%. At what level does the average order value (AOV) need to be in order for the client to be on target?

• I can’t help but think I need order total or revenue data