A stall was selling flowers. ¹₅ of the earnings are from the sale of 10 lilies and 20 sunflowers. Of the rest of the earnings, ²₅ are from the sale of lilies and ³₅ are from the sale of sunflowers. Each sunflower costs twice as much as each lily. How many flowers were sold?

10 lilies and 20 sunflowers	Rest of the earnings		Total earnings
1x5	4x5
	Roses	Carnations
	2x4	3x4
5	8	12	25

Fraction of the earnings left after the sale of 10 lilies and 20 sunflowers
= 1 - ¹₅
= ⁴₅ 

The rest of the earnings is repeated. LCM of 4 and 5 is 20.

Cost of 1 lily = 1 u
Cost of 1 sunflower = 2 u

Cost of 10 lilies = 10 x 1 u = 10 u
Cost of 20 sunflowers = 20 x 2 u = 40 u

Total cost of 10 lilies and 20 sunflowers
= 10 u + 40 u
= 50 u

⁵₂₅ of the earnings → 50 u 
¹₂₅ of the earnings → 50 u ÷ 5 = 10 u 

⁸₂₅ of the earnings → 8 x 10 u = 80 u 

Number of lilies sold that contributed to the rest of the earnings
= 80 u ÷ 1 u
= 80

¹²₂₅ of the earnings → 12 x 10 u = 120 u

Number of sunflowers sold that contributed to the rest of the earnings
= 120 u ÷ 2 u
= 60

Number of flowers sold
= 10 + 20 + 80 + 60
= 170

Answer(s): 170