For this specific deal there are no dealer fees on the adder.
The dealer fee would be calculated:
Base System Cost/(100 - dealer fee %) = X then X - base system cost = dealer fee amount
$21,330/.7721 = $27,625.96 then $27,625.96 - $21,330.00 = $6,295.96
** .7721 = (100 - 22.79)
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Calculating the dealer fees on a custom adder
The customer added a $22k battery to this system and asked why it was showing as $32,467.53. It's because the dealer fee for that lending option is 32.24%.
Calculation for the dealer fees on this adder would be: adder cost / (100 - dealer fee %) = X , then
X - adder cost = dealer fee amount
22,000 / .6776 = $32,467.53
$32,467.53 - 22,000 = 10,467.53
(.6776 came from taking 100 - dealer fee %)
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