Answer: It will take 5 days to reach his goal
Explanation:
How I got 5 days was if you do
1.75 x 45 = 78.75
SO you add 30.oo his mom gave his and 78.75
keep add 78.75 intill
you may go over bugget.
I went over my work on a caculator
and I got 423.75
Let me know if you get something different or I did something wrong.