A 4-L water filter is used to fill 200 mL cups and three 750 mL drink bottles How much water is left in the water filter

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much