Hello everyone I need help in this one my sister is doing a whole worksheet and the teacher doesn't explain properly and her sound is very bad so we don't understand please help me 8 + 3 x 7 – 8

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?