My question is: Penn operates an ice cream stall for a week. On the first day, she made $10. Every day after that, she made $4 more than the previous day. How much money did Penn make after 5 days? Your thoughts:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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On the second day, Penn made $10 + $4 = $14. On the 3rd day, she made $14 + $4 = $18. On the 4th day , she made $18 + $4 = $22. On the 5th day, she made $22 + $4 = $26. After 5 days, Penn made a total of $10 + $14 + $18 + $22 + $26 = $90. The final answer: 90.