Owen has a mask collection of 300 masks. He keeps 63 of the masks on his wall. What percentage of Owen's mask collection does he keep on his wall?

We know that she earns 5.75 $  per hour.

She worked  12.4 hours per week that year, so for each of those weeks she earned:

5.75 * 12.4 = 71.30 $

From the information we have, she worked for 50 such weeks in that year.

So to get the total amount earned, we multiply the earnings of one week by the total number of weeks she worked, so:

71.30 * 50 = 3,565.

She earned a total of  3,565 $ that year.