Last year Tuvalu produced 800 boats at a cost of $2,000 each but only 500 were sold due to recession at a price of $3,200 each. They produced $5 million worth of copra from their coconuts and consumed $2 million of it locally. The rest was used in the production of coconut oil cream which was exported for a value of $10 million. Based on this information, what was Tuvalu's GDP for last year