Four members of a family want to raise funds for a Hawaiian vacation. They distribute 600 ice-cream packs equally among themselves, and decide that each pack is to be sold for $4. If two of them manage to sell 75% of their ice-cream packs and the other two manage to sell only 40% of their packs, how many dollars did they collect?   225   345   1020   1380   2400   Hint Half-n-half Clue