I agree with everyone else above – you definitely don’t care how the monthly payment was derived, whether from different discounts, MF, etc. What most of people on LH use is the calculator, as noted above it’s for educational purposes for the most-part.
What you may consider is if there is a significant difference in the DAS amounts. For me, if less than $1500 difference, I simply spread over the lease as @jim2527 suggests. If the amount is different by significantly more then I add an adjustment for after-tax potential earnings on that money (assumed rate x half of the lease term since it’s paid down / saved linearly in the payments),
For example, if I assume I could make 4% after tax on the money for a 36 month lease, I’d load 6% to the difference in the DAS amount. So for a $1,500 difference, I’d add $90 for lost earnings on a 36 month lease (average of 1.5 years x 4% x $1,500). As you can see, $90 over a 36 months is $2.50 per month, so you can see why I wouldn’t bother at that point.
If in evaluating MSDs, I’d use the full lease term to approximate a comparable payment, since those aren’t paid off during the lease. So putting down $5k of MSDs theoretically costs me 3 years of return on that which is $600 ($5,000 x 4% x 3 years), which is about $17/month. Usually the MSD reduction far exceeds that, so it makes sense to pay them.
FWIW, usually the marked up MF isn’t in either party’s best interest as the leasing company only shares part of that with the dealer. I found some documents from a few years ago that showed that Chrysler Capital gave the dealer 50% of the increased payment. The rest covers Chrysler Capital for paying it to the dealer up front, the contingency that the lease don’t go to fruition, and of course for them having their hand in the cookie jar. So if I’ve squeezed everything I think I can out of the deal, I would offer for them to give me the base factor and make the payment the average of the base & marked up payments (i.e., increase the car price by half of the difference in the payment), so it’s a wash for the dealer and I save a few bucks. So here, the structure could matter and might save you another $10 - $20 a month…