Section $1\mathrm{.}7$ showed that in $1997$ Los Angeles County air had carbon monoxide $($CO$)$

levels of $15\mathrm{.}0$ ppm$.$ An average human inhales about $0\mathrm{.}50$ L

of air per breath and takes about $20$ breaths per minute.

Part A

How many milligrams of carbon monoxide does the average person inhale in an $9$ hour period for this level of carbon monoxide pollution? Assume that the carbon monoxide has a density of $1\mathrm{.}2$ g$/$L

$.($Hint: $15\mathrm{.}0$ ppm CO

means $15\mathrm{.}0$ LCO

per $106$L

air.$)$

Express your answer using two significant figures.