“Double cash” boost

  7. WEAPON & BOOST

“Double cash” boost will help you double the “cash” reward of main battles (except: Challenge mode, Zombie River). Cash only, no gold.
See how this boost work:

  1. Headshot bonus: 426
  2. Combo Kill bonus: 732
  3. Item drops: 330
  4. Cash reward: 1,500 (Not shown in Mission Complete, only get when win). If use Double Cash, Cash reward: 1,500 x 2 = 3,000

==> TOTAL REWARD: 426 + 732 +330 + (1500 x 2) = 4,488