Trade & FA 2024-25:

[F Gump]

14,9 mil includes 2 vet min cap holds, if I am not wrong. One of that cap holds is gone, if you bring in a FA. Which means the available salary is over 15 mil with cushion included.

Mavs can't even pay 13.9 to DJJ as it is more than MLE. If DJJ takes less than full MLE, than Mavs have even more spread.

I'm not sure what you were saying here, but 14,893,363 is the money that is left with 13 players accounted for, and DJJ is still unsigned. 

After subtracting 1M for an operating cushion, that leaves ~13.9M to allocate between some combo of DJJ (whose limit would be 12.9), the 15th slot, and a more-than-100% trade match.