Question about dining plan upgrade cost

[blessedby3]

We have 8 nights booked at AOA for 5 Disney adults and 1 Disney child. To upgrade the cost difference is $771.60 according to the booking agent.
I was wondering if there was tax or something because I come up with a different amount.

My calculations are:
$60.04 (reg plan cost)- $41.99 (counter service cost) = $18.05 x 5 (Disney Adults) = $90.25 x 8 (nights) = $722.00
and for the child:
$19.23-$16.03= $3.20 x 8 nights = $25.60

$722.00 + $25.60 = $747.60 and they told me on the phone it would be $771.60. Just wondering what I am doing wrong as that is a $24 difference.

Thanks for the help

 

[sharonabe]

The cost of the DDP is $60.64, not $60.04. So $.65 x 5 x 8 = $26

 

[blessedby3]

The cost of the DDP is $60.64, not $60.04. So $.65 x 5 x 8 = $26

Ok, thanks. Guess the website I was looking at had the wrong price. It wasn't a WDW site.