Patrick B. answered 09/21/19
Math and computer tutor/teacher
Jenna's gross monthly income is 20*9*4 + 8*9*1.5 =
720 +108 = 828
Her annual gross is 12*828 = 9936
After 20% taxes, her NET annual salary is 80% of 9936 = 7948.8
After car insurance, she will have 6948.80
Then for her trip to Mexico, she will have 5448.80
DIviding by 12, she has 5448.80/12 = 454.06 per month
to spend on gas and maintenance of her car.