Devon set a SMART goal for his hand$-$knit sweater business: "Gain $20\%$ more new customers by the end of the year".

What would be a good KPI for him to use when evaluating if he is reaching this goal?

Sales Revenue $($how much money you generate from sales$)$

Brand awareness $($number of people who know about your brand$)$

Cost per lead $($how much jt cost in marketing dollars to generate a lead$)$

Conversion rate $($how many people took action, e$.$g$.$ bought something, out of the people you attracted$)$