$3.$ Digitalis, a drug used to control atrial fibrillation in patients is to be given as $20\mathrm{.}0$ ug$/$kg body weight. The drug concentration must be carefully controlled and accurately measured or the patient may die from too low of concentration from heart complications or too high concentrations of fatal overdose. Calculate the mg of digitalis needed to treat a $160\mathrm{.}0$ poundpatient. $2\mathrm{.}205$ pounds $=1\mathrm{.}00$ kg$.$