A stall was selling flowers. ¹₅ of the earnings are from the sale of 7 lavenders and 13 tulips. Of the rest of the earnings, ²₃ are from the sale of lavenders and ¹₃ are from the sale of tulips. Each tulip costs twice as much as each lavender. How many flowers were sold?

7 lavenders and 13 tulips	Rest of the earnings		Total earnings
1x3	4x3
	Roses	Carnations
	2x4	1x4
3	8	4	15

Fraction of the earnings left after the sale of 7 lavenders and 13 tulips
= 1 - ¹₅
= ⁴₅ 

The rest of the earnings is repeated. LCM of 4 and 3 is 12.

Cost of 1 lavender = 1 u
Cost of 1 tulip = 2 u

Cost of 7 lavenders = 7 x 1 u = 7 u
Cost of 13 tulips = 13 x 2 u = 26 u

Total cost of 7 lavenders and 13 tulips
= 7 u + 26 u
= 33 u

³₁₅ of the earnings → 33 u 
¹₁₅ of the earnings → 33 u ÷ 3 = 11 u 

⁸₁₅ of the earnings → 8 x 11 u = 88 u 

Number of lavenders sold that contributed to the rest of the earnings
= 88 u ÷ 1 u
= 88

⁴₁₅ of the earnings → 4 x 11 u = 44 u

Number of tulips sold that contributed to the rest of the earnings
= 44 u ÷ 2 u
= 22

Number of flowers sold
= 7 + 13 + 88 + 22
= 130

Answer(s): 130