问题如下：
Based on Exhibits 1 and 2 and Janssen’s translation method, retained earnings for Triofind-B translated into Triofind’s presentation currency as of 30 June 2017 are closest to:
选项：
A. NER150,225.
B. NER170,940.
C. NER172,414.
解释：
A is correct.
Triofind uses the temporal method to translate the financial statements of Triofind-B. The temporal method uses the current exchange rate for translating monetary assets and liabilities and the historical exchange rate (based on the date when the assets were acquired) for non-monetary assets and liabilities. Monetary assets and liabilities are translated using the current exchange rate (as of 30 June 2017) of NER1 = BRD1.17 (or NER0.8547/BRD), and non-monetary assets and liabilities are translated using the historical exchange rate (as of 30 June 2016) of NER1 = BRD1.15 (or NER0.8696/BRD). Inventory is translated at the 2017 weighted average rate of NER1 = BRD1.18 (or NER0.8475/BRD). The difference required to maintain equality between (a) total assets and (b) total liabilities and shareholder’s equity is then recorded as retained earnings. The retained earnings for Triofind-B translated into Norvolt euros (Triofind’s presentation currency) as of 30 June 2017 is calculated as follows:
解析：temporal method下，计算Retained earnings要通过会计恒等式反求。monetary 资产和负债用current rate：cash=1,350,000/1.17=1,153,846NER，Notes payable=500,000/1.17=427,350NER。non-monetary资产和负债用取得时的历史汇率：inventory=500,000/1.18=423,729NER。Common stock=1,150,000/1.15=1,000,000NER。轧差得到RE=1,153,846+423,729-427,350-1,000,000=150,225NER。
已知Common stock里有100万NER和50万BRD，那第三问转Common Stock的时候这两种货币的金额不应该封开算吗？或者说只有那50万BRD才需要用historical rate转一次？
