Since you’ve already paid a $179 deposit upfront and the Kickstarter price for the 220'' screen is $599 USD, The remain difference for the screen is $420
The US/CA is free shipping and for EU, UK, AU, JP who have already paid the $20 shipping deposit, the shipping cost is $40 and remaining shipping diffference is $20
The total remaining balance for the 220'' white matte screen is $420, which covers both the additional screen and shipping fees