Rule of 9
If you have un reconciled balance - If the variance is dividable by 9, likely a number reversal – you have input 11 instead if 21
Example
11 or 21 = difference of nine
17 or 71 = difference of 54 (divided by nine)
Sales rate factor determiner
to apply to any gross amount that includes sales tax to obtain actual sales tax amount.
Sales tax divided by (sales tax rate +100 ) = rate to apply to gross amount to get sales tax amount.
5 divided by 105 = .0476190476
$1.05 x .0476190476 = 5 cents sales tax.
13 divided by 113 = .11504424778