Why is there a difference between Time Keeper Quantity times the Rate versus the Invoice's Subtotal?
Clio also uses the same logic when applying Tax to Line Items. It first multiplies and rounds the Quantity and Rate before applying the Tax rate.
Tax = round(Xq * Xr) * Tax%
Clio calculates the Invoice subtotal by adding together each of the Line Items individual totals. These Line Item totals are a result of multiplying the Quantity time the Rate followed by rounding the result.
Here is an example of what the equation would look like: Subtotal = round(Xq * Xr) + round(Yq * Yr) + round (Zq * Zr) + ...
Calculating the subtotal by multiplying the Time Keeper's Quantity and Rate ignores the individual rounding that occurs on each Line Item's total, they-by resulting in a slightly different subtotal than shown on the Invoice.