Bond, Insurance & Workers comp


Hi Everyone,
Im new to this community, thinking for long time already to start my roofing business.
In order to build an accurate Business plan, lm missing some details about those 3 aspects - Bond, Insurance & Workers comp.
Currently located in CA, wonder how much it will be to apply those 3.
I understand that the workers comp varies depending on the amount of work that you do, but what about the other two?
how much is it to insure a company and have a bond? Monthly wise and approximately number will be just fine.