The yellow sweater costs only 12 yuan. 来源：在表达购物场景中，用英语表示商品的价格时，通常使用 "cost" 这个动词。
例句：
"That shirt costs 20 dollars." (那件衬衫要20美元。) "How much does this dress cost?" (这件连衣裙要多少钱？) "Those shoes are on sale for 30% off their original cost." (那些鞋子打折后原价的30%。)