You are learning quantities: you will read the scene it happens in, take apart the pattern behind them (quantity vocabulary), hear them in a conversation, rehearse them, and finish by saying one thing out loud to be graded.
Vietnamese markets use metric units. The quantity conversation is fast, transactional, and warm when you know the words.
Vietnamese xoài Cát Hòa Lộc from the Mekong Delta — sweet, fragrant, flesh almost custard-like. The difference in price between varieties is significant.
He picks up a xoài Cát. 「Xoài này bao nhiêu một kg?」 — 「Tám mươi nghìn một kg.」 80,000 per kilo.
「Cho tôi nửa kg thôi.」 The vendor weighs: 520g. 「Bớt đi một chút được không?」 She removes one mango. 480g. 「Vậy được rồi!」
「Không cần túi. Cảm ơn chị!」 She smiles. He peels one on the way out. The juice runs down his hand. 「Ngọt quá!」