✔ 最佳答案
I do agree that the contributions to the GDP should be 850.
Even though you produce the cake for you own use, production cost will be still involved for the flour, sugar and egg.
eg: if your mum buy rice for your family use, will it be contributed to the GDP. Surely Yes.
$250 (self-use) so it is already the final product
$250 (production cost for selling the cake)
$350 (Profits of siu fun)
the above will be true only if "這項生產活動" be regarded as the whole process of producing those cakes (include the production of flour, sugar and egg). If not the production only contibute to the GDP for $350, cause the $500 should be the contribution of the produers of flour, sugar and egg.
2009-02-19 23:40:25 補充:
production of flour, sugar and egg 算唔算這項生產活動 呢點要睇出題果個點 define.
如果focus 係這項生產活動(少芬make cake) 咁材料咪唔算law 因為佢會係belong to另一項生產活動
2009-06-19 01:23:20 補充:
家人煮即食面既話 你買即食面個cost 咪入gdp law~
但你煮即食面呢個service 冇cost involve 咁點會入gdp = =