Obviously 600.
it equals to 600
7:00
600 + 50*10 + 0*1 = 600+500 = 1100
5,300
it equals 1000000000002290 because 600 times 3= 1800 + 500=2300 and 999999999999990 + 2300 = 1000000000002290
2099
4000+600+8=?
600 plus 489 equals 1,089.
40000 + 600 + 9000 + 49614 = 99214
600 + 500 + 800 + 900 + 9234 = 12034
0 plus 501-60-600 plus 10 is equal to -149