There are ten left, I am going to use USD $ but it will be equal to euros. There are ten left, and 1/2 were sold for 5, 30 x 5 = 150. 1/3 were sold for 4, 20 x 4 = 80. 80 + 150 = 230. 60 x 3 = 180. 230-180=50. $2.5 each if she wants profit that adds up to $75.