This is Utah's payroll this year before the trade, and also what the 3 players they traded away are due next year
Player 2005/06 2006/07
Carlos Boozer $11,593,816 $11,593,816
Andrei Kirilenko $10,967,500 $12,338,437
Mehmet Okur $8,250,000 $8,250,000
Matt Harpring $4,545,000 $0
Gordan Giricek $4,000,000 $4,000,000
Deron Williams (contract hasn't been finalized yet)
Curtis Borchardt $1,969,993 $3,033,789
Raul Lopez $1,744,312 $2,550,185
Kris Humphries $1,592,400 $1,703,520
Kirk Snyder $1,437,240 $1,537,440
Keith McLeod $937,500 $0
CJ Miles $0 $0 $0 $0
TOTALS: $46,100,261 $39,423,213
They are giving up $5,151,545 this year, and bring back $4,400,000. Ostertag's deal ends this year, and next year Utah was due to pay the 3 $7,121,414. They will have a payroll of $41 million next.
It was all about cap space.