[In the end], there were twice as many angelfish as goldfish, and an equal number of guppies and angelfish left

An : Go : Gu : Total
2 : 1 : 2 : 5

Fishes left after selling → 301 – 35 – 76 = 190

5 units = 190
1 unit = 190 ÷ 5
= 38 goldfish in the end

38 + 35 = 73 goldfish at first