To calculate the cost of abandonment in a contact form funnel, we can use analytics and simple funnel analysis. First, we check analytics to see how many visitors reach the contact page within a given period and how many actually submit the form. If we know, for example, that 85% of visitors leave without submitting the form, we can estimate the number of lost potential leads. Then we multiply the estimated number of lost leads by average lead value or average customer value to approximate the monthly financial cost. This calculation clarifies how expensive form abandonment is and helps justify testing alternatives such as conversational AI.