What is Total Cap Reduction comprised of?

I trying to get my calcs to match the dealers. I thought net cap cost was the result of gross cap - cust cash- total rebate. Apparently not because it doesn’t equal Total Cap Reduction. What is Total Cap Reduction coming from?This example:
gross cap: 31394
Cust cash 1760
Total Rebates 16000
Net Cap Cost 15572.66
Total Cap reduction 15821.34

not sure, but is this for a Kia Soul EV lease? must be with that msrp and discount