According to a financial analyst, if Company C sets the unit selling price of its product at x dollars, then its monthly profit P, in dollars, is given by the formula ~$P=1000\left ( 4x-x^{2}-2 \right )$~. According to this formula, at what amount should Company C set the unit selling price of its product so that its monthly profit is $2,000 ?$1

$2$3

$4$6