Formula Custom Field - calculating value using multiple custom fields

Formula Custom Field - calculating value using multiple custom fields

Howdy,

I would like to collect a rough estimate of the annual value of an incoming lead. We have a few fields to work with:
  • how many events they organize annually
  • how many people attend those events
  • how much they charge for tickets

The basic formula is [(# of events annually)*(# of people attending each event)]  *   [(average ticket price for an event)*(.019)]

I can't seem to find a way to make this work. My attempt:

Abs(${Leads.How many events do you organize per year?}*${Leads.On average how many people attend your events?})*((${Leads.What is the average price for your events?}*.019)+.99))