Its 1400 + 800 for objective so you will have 2400 against ct + a guy that gets 300 for planting, and the 150 you will have left from the first round after buying kevlar and the additional kill rewards on top of that
ct will have 3250 + kill reward
Therefore its a smart play to forcebuy at 0-1, you can afford smgs, ct can afford smgs, since both teams have the same weapons its about a 50/50 chance to go 1-1, if you eco 0-1 you will most likely end at 0-2, and with a 50/50 chance to go 1-2 on fullbuy after that since its fullbuy vs fullbuy
Terrorists:
2400
- 1000 for armor
--------
1400 =/= enough for a galil
Counter-Terrorists
3250
- 1000
--------
2250 = enough for a famas
Terrorists cannot also buy a galil, they can only buy pistols / UMP / Mac-10. If any of them die 2nd round, they are not all going to upgrade to M4s, most of them are going to keep whatever gun they were using the round before until 0-3.
2250 isn't enough for famas, because you want kit, a couple of flash/nades, and especially smokes, where as for terrorists you don't need kit, you might need some flashes to win the round but its not as critical as it is for the ct side. That is why people buy smgs instead of famas + that the kill reward is double.