Provide channel-specific CAC calculation tools

Standard CAC calculation breaks down when different channels have different lag times between spend and conversion, like content marketing might take 6 months while paid ads convert same day. Do you match spend to when customer converts or when you spend the money? Both have problems. The attribution window question is impossible to answer perfectly, customer might see a paid ad, read blog posts for 3 months, then convert after a cold email. Which channel gets credit? Most tools use last touch attribution which gives all credit to cold email even though blog posts did the heavy lifting, totally wrong but simple. Blended CAC smooths out all these timing and attribution issues but hides which channels actually work, you just get one average number that doesn't help with budget allocation decisions at all. Need channel-specific CAC but calculating it accurately requires sophisticated attribution modeling that most small companies can't do properly. The organic vs paid debate is always messy, organic traffic has zero direct cost but required months of content creation labor which is real cost that should count somehow. How do you properly account for founder time spent on content vs hiring someone, the costs are different but both are real.