Rael sold 40 more banana muffins than blueberry muffins on Wednesday. On Thursday, the number of blueberry muffins he sold decreased by 25% while the number of banana muffins he sold remained the same. He sold each tart for $4.20. He sold a total of 285 muffins on Thursday. How much money did he receive from the sale of muffins on both days?

	Banana muffins	Blueberry muffins	Total
Comparing banana and blueberry muffins  at first	40 more
Before	4 u + 40	4 u	8 u + 40
Change		- 1 u
After	4 u + 40	3 u	7 u + 40

25% = ²⁵₁₀₀ = ¹₄

Total number of muffins sold on Thursday
= 4 u + 40 + 3 u
= 7 u + 40

7 u + 40 = 285
7 u = 285 - 40
7 u = 245 

1 u = 245 ÷ 7 = 35

Total number of muffins sold on Wednesday
= 4 u + 40 + 4 u
= 8 u + 40

Total number of muffins sold on both days
= 7 u + 40 + 8 u + 40
= 15 u + 80
= 15 x 35 + 80
= 525 + 80
= 605

Total amount received from the sale of muffins on both days
= 605 x 4.20
= $2541

Answer(s): $2541