How much is a Senatorial campaign cost on average?

IAm thinking about running and I need to know if I have enough to run in the election after next.How much is a Senatorial campaign cost on average?
It varies widely from state to state - it tends to be cheaper in smaller and more rural states, because advertising is cheaper, than in larger states. Check with your state party - they can probably give you a better idea.How much is a Senatorial campaign cost on average?
exactly 6.72 million dollars and 65 cents