Need help in understanding the Merc GLC 350e lease monthly payment

I got below quote from a deal for GLC 350e in WA. I am unable to understand (or use lease hacker calculator) how did they arrive at the 932 monthly payment. Also, what does negative downpayment means? Could someone please help me put this number into the calculator.

MSRP (Sticker Price) $68,615 Term 36 Months
Dealer Discount -$6,000 Annual Mileage 12,000
Mercedes-Benz Lease Incentive -$7,500 Residual Value (55%) $37,738
Total Due At Signing $0.00
Price $55,115
First Payment $932.18
Star Loyalty Bonus Program -$500
Down Payment -$2,199.18
Total Purchase Price $54,615.00 Estimated Up-Front Registration & Fees $1,221.50
Sales Tax $45.50
Lease Payments $932.18/mo

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