Each draw costs 75 credits at 0.53% each. Worst case requires 189 draws.
Worst case 1 DNA: 75*189 = 14,175 credits

Purchase 2750 credits during event:
Each draw costs 60 credits.
Worst case 1 DNA: 60*189 = 11,340 credits

*Afer 10 draws gives 2 x trident brands
*After 20 draws gives 5 x z bosons
*After 30 draws gives 1 x destroyer chip
*NON REPEATABLE - Only get these rewards ONCE.