Here is the price breakdown for a SEVEN-DAY cruise with your photos on a USB when pre-purchased at mycruisephotos.com:
10 photos: $149.95
20 photos: $249.95 (15-percent discount already applied)
Unlimited photos: $295.95 (15-percent discount already applied)
So I would imagine the onboard price at Shutters is as follows:
10 photos: $149.95
20 photos: $294
Unlimited photos: $348
And so the onboard price at Shutters WITH the 10 percent DISNEY CHASE Discount would be:
10 photos: $134.95
20 photos: $264.60
Unlimited photos: $313.20
And 8X10 prints are $20.95 on board. No Disney Chase discount available. However, Disney Chase also mentioned a 15-photo package, which mycruisephotos does not have listed on its website.
(This is just based on the prices mycruisephotos has listed, what it says its discounts are and what Disney Chase lists as its discounts. Your mileage might vary.)
https://disneycruise.disney.go.com/onboard-activities/shutters-photography-shop/
Onboard prices for 2018 cruise (14 nights)