The customer acquisition cost $($CAC$)$ is $...$

Select one:

a$.$

derived from sales records, usually per product category and$/$or customer type.

b$.$

the total marketing or advertising investment$/$cost aimed at acquiring new customers $-$: the number of new customers as a result of this marketing or advertising campaign.

c$.$

the $($total sales $-$: number of customers$)-$: the average number of purchases per period per customer.

d$.$

the $($total sales for period $-$: average value of a sale$)-$: the number of customers.