New User, Having Problems Entering Amounts for Potentials

New User, Having Problems Entering Amounts for Potentials

I just started using Zoho today, after being a Salesforce user for years.  I imported my accoutns, contacts, and opportunities (potentials), but the "Amount" field does not carry over with the import.  When I try to manually enter the amount, I get an error message saying "null".  I've tried entering with and without the dollar sign, commas, and period but nothing seems to work.  Any suggestions?