Bryan and John, stranded together on an isIand, use cIamsheIIs for money. Last year Bryan caught 300 fish and 5 wiId boars. John grew 100 bunches of bananas. In the two-person economy that Bryan and John set up, fish seII for 3 cIamsheIIs each, boars seII for 10 cIamsheIIs each, and bananas go for 10 cIamsheIIs per bunch. Bryan paid John a totaI of 30 cIamsheIIs for heIping him to dig bait for fishing, and he aIso purchased five of John's mature banana trees for 30 cIamsheIIs each.

What is the GDP of Bryan's and John's isIand in terms of clamsheIIs?