Kathy, Dana and Linda each sold an equal number of muffins. Kathy collected a total of $54.70 from selling 8 matcha muffins and some strawberry muffins. Dana collected a total of $59.20 from selling 13 matcha muffins and some strawberry muffins. How much did Linda collect if she sold only strawberry muffins?
Dana collected more money than Kathy from the sale of the muffins but the number of muffins sold by each girl was the same. This shows that each matcha muffin is higher priced than each strawberry muffin. 

Amount that Dana collected more than Kathy
= 59.20 - 54.70
= $4.50

Number of more matcha muffins that Dana sold
= 13 - 8
= 5

Extra amount collected from the sale of each matcha muffin
= 4.50 ÷ 5
= $0.90

Total extra amount collected from the sale of 8 matcha muffins
= 8 x 0.90
= $7.20

If Kathy sold only strawberry muffins, she would collect $7.20 less than her original amount.

Amount that Linda collected if she sold only strawberry muffins
= 54.70 - 7.20
= $47.50

Answer(s): $47.50