Why is a parse error received when multiplying Price by Quantity?

Dataset:

$\backslash$table$[[$Record$,,$Price,Quantity$],[,1,$$$3\mathrm{.}99,3],[*,2,$$$4\mathrm{.}50,2],[*,3,$$$3\mathrm{.}00,5],[,4,$$$2\mathrm{.}99,6],[,5,$$$1\mathrm{.}50,7]]$

Configuration:

Formula $(158)-$ Confguration

Error:

Parse Error at

char$(9)$: Formula:

tried to apply

numeric operator