Ken sold 120 more vanilla puffs than cherry puffs on Tuesday. On Wednesday, the number of cherry puffs he sold decreased by 70% while the number of vanilla puffs he sold remained the same. He sold each tart for $4.70. He sold a total of 770 puffs on Wednesday. How much money did he receive from the sale of puffs on both days?

	Vanilla puffs	Cherry puffs	Total
Comparing vanilla and cherry puffs  at first	120 more
Before	10 u + 120	10 u	20 u + 120
Change		- 7 u
After	10 u + 120	3 u	13 u + 120

70% = ⁷⁰₁₀₀ = ⁷₁₀

Total number of puffs sold on Wednesday
= 10 u + 120 + 3 u
= 13 u + 120

13 u + 120 = 770
13 u = 770 - 120
13 u = 650 

1 u = 650 ÷ 13 = 50

Total number of puffs sold on Tuesday
= 10 u + 120 + 10 u
= 20 u + 120

Total number of puffs sold on both days
= 13 u + 120 + 20 u + 120
= 33 u + 240
= 33 x 50 + 240
= 1650 + 240
= 1890

Total amount received from the sale of puffs on both days
= 1890 x 4.70
= $8883

Answer(s): $8883