Baseball America's Jim Callis has the breakdown of where teams spent their money in the draft, and compared it to the overall slot recommendations.
The Astros spent the 11th-highest amount of money on the first ten rounds of the draft (12 picks) at $6,513,530. What was the slot recommendation for their picks? $6,528,900. So the Astros went under slot by $15,370.
19 teams went over slot proving, once again, just how effective the slot recommendations are. /sarcasm.
The Dodgers went over slot by 224%, thanks largely to Zach Lee's last-minute signing.