The manager would like a quick way to see a guest's room total $($AFTER Add$-$On and Tax$).$ Use the IFERROR, INDEX and MATCH functions to display the room total with tax for the guest with the last name Vazquez.

$[-6\mathrm{.}8]$

The grader found the following:

$-2\mathrm{.}7$ Only $1$ of the $3$ values in range Q$19$:Q$21$ is correct.

$-0\mathrm{.}7$ The formula in cell Q$19$ does not appropriately reference N$4$:N$85$ on the December Guests worksheet.

$-0\mathrm{.}7$ The formula in cell Q$19$ does not appropriately reference P$19$ on the December Guests worksheet.

$-0\mathrm{.}7$ The formula in cell Q$19$ does not appropriately reference D$4$:D$85$ on the December Guests worksheet.

$-2$ At least one formula in range Q$19$:Q$21$ is not reused.