if i did the math, using osf's numbers, right, there is 1,012,430 left from the 11,177,700 to use plus whatever that cushion is.
Per my math HOU has $942,500 (pre 5% cushion, which is $558,885) to sign Rd. 2 Fontana, Rd. 7 Tucker, and Rd. 8 Heineman (who has already been signed but I haven't seen bonus info on). This puts HOU $193,400 over its slot allotments for the 8 (of 11) signed picks through Rds 1-10 ('signed picks' for this response does not include Heineman, since I don't have bonus info for him yet).
So... in summary... HOU can spend up to $1.5M without pick penalty to sign Rd. 2 Fontana, Rd. 7 Tucker,
and Rd. 8 Heineman. I'd imagine that all 3 of those can be signed for less than the $942,500 that HOU has left within their total $11,177,700 bonus pool allotment.
The bigger question is whether HOU may still sign some of the rd 11-40 HS'ers still 'on the board' - primarily rd. 11 pick Hunter Virant (LHP) or rd. 26 pick C.J. Hinojosa (SS, local kid). [And in case you're trying to do the math, only amounts >$100K count against the pool for draftees signed from the 11th-40th round. E.g., Rd. 2 Fontana, Rd. 7 Tucker,
and Rd. 8 Heineman were signed for a total of $1M, then HOU would have $600K to sign either Virant
or Hinojosa ($100K plus up to $500K). That said, its generally thought that Hinojosa is simply going to UT regardless of the offer, and that Virant probably isn't going to sign for $600K].
Bet you're sorry you asked now, eh?!?