For all those currency experts

AFers… For those of you who work in currency trading/aware of the P&L impact of currency positions, this question is for you. a. So if I have a portfolio where I am Short Yen Exposure, Long $ exposure, Long Euro Exposure, Long GBP Exposure. The net position in terms of Yen exposure is that I am short Yen and calculate the P&L over ten years using USD/JPY, EURO/JPY and GBP/JPY currency changes. b. If I were to represent the same Net Yen exposure in USD terms and then calculate the P&L over ten years using the USD/JPY, USD/Euro, USD/GBP currency changes, should I get the same net P&L as obtained as in “a”. The reason I am interested in USD based terms is because I am US based company. TIA