Im not sure what would best the best way to achieve a pricing calculation. So any help would be appreciated.

product A = $50 if the quantity is 1
product A = $25 for any quantity greater than 1

I can achieve this through conditional pricing i understand that. But the hurdle im having is
when quantity is greater than 2 the total price becomes $50 which is not what i want. 2 quantity should be a total price $75 and if a 3rd quantity is added it would be $100 and so forth.