Free Agents Salary Cap Question

We have just signed a handful of free agents for probably the league minimum.. Is that about 250K? and count towards the salary cap?

Did we contract them for a weekly salary and will only sign them to the league minimum if they make the team?

If we signed them for the league minimum and that amount counts against the cap then aren't we pulling out the spare cap. change we are trying to accumulate for Drew? Is it worth it for extra the extra bodies?

Please comment.