Leads come in at night and on weekends. If nobody answers fast, many of them call the next agent. Plug in your numbers. Every field is your own estimate, so change anything that doesn't fit.
How the math works
Leads per month × after-hours share = after-hours leads.
After-hours leads × share lost = leads that slip away each month.
Lost leads × 12 × your closing rate = deals missed per year.
Deals missed × your take per deal = commission lost.