How Do I Back Out The Sales Tax To Find The Original Price?

Divide the total price by (1+ sales tax rate).
So, if the bill says $26.5 and the tax rate is 6%: Then $26.50/1.06=$25.00 .
You can double-check by reversing the procedure: Tax = $25.00 x 6% = $1.50. So total price = ($25.00 + $1.50) = $26.50.

Our sales tax is 5.5 percent how do I back that out of 416.20

If your original total is $45.00, multiply that by .9238. (for 8.25% tax) You get 41.57.  
$45.00 - $41.57= 3.43

To double check yourself: Multiply $41.57 by .0825= 3.43.

Also when you add 41.57 plus 3.43 you get $45.00
So the tax would have been $3.43.

73,337.59

If total is $154,215.34 what is the cost if the sales tax is 9.25%

I know  how much tax I paid and I know what the % was but I don't know what the pre tax total was