1.these envelopes// 5,000 dong.
-- How much are these envelopes ?
->They're 5,000 dong.
2.the picture// 64,000 dong.
--How much is the picture ?
->It's 64,000 dong.
3.a local stamp and an envelope// 1,500 dong.
--How much are a local stamp and an envelope ?
->They're 1,500 dong.
4. those sandwiches// 8,500 dong.
--How much are those sandwiches ?
->They're 8,500 dong.
5.this poscard// 12,000 dong.
--How much is this poscard ?
->It's 12,000 dong.
6.the phone card// 50,000 dong a pad of paper//15,000 dong.
--How much is the phone card ?
->It's 15,000 dong.
7.three boxes of chocolates//75,000 dong.
--How much are three boxes of chocolates ?
->They're 75,000 dong.