That is a staggering number and could put most businesses out of business. The first and foremost thing you should do is make sure you have insurance in place to cover losses from a cyberattack.
Also, if you have a computer that you do the financials on, make sure you only use that computer for financials. Why? A cybercriminal’s dream is to get access to a computer that is doing online banking transactions. They get you to install malware and then they can get the credentials they need to move the money out of your account. And the bank does not have to cover the money loss if they can prove they had the correct technology in place and you did not.
Also make sure you have the proper firewall, spam filter and virus scanner in place to help prevent these attacks.