I can tell you that there is zero chance that you can get a Pure for less than $87K if you cancel your reservation.
For me the math looks like this:
Best case:
Purchase price $77,400
Destination Fee $1,650
Documentation Fee $75
Sales Tax (FL) $4,644
------------------------
Sub Total $83,769
Less EV tax credit $7500
-------------------------
Grand Total $76,269
Probable case:
Grand Total $83,769
Either way, if I proceed with the above I will get 3 years of EA charging - what ever
THAT is worth...
If I were to purchase now:
Purchase Price $87,400
Destination Fee $1,650
Documentation Fee $75
Sales Tax (FL) $5,244
----------------------------
Grand Total $94,369