Linh has 400.000 đồng in her wallet, in a mixture of 5.000, 10.000, 20.000 and 50.000 đồng notes. As a surprise, Thủy opens Linh’s wallet and replaces every note with the next larger note. So, each 5.000 đồng note is replaced by a 10.000 đồng note, each 10.000 đồng note is replaced by a 20.000 đồng note, each 20.000 đồng note is replaced by a 50.000 đồng note and each 50.000 đồng note is replaced by a 100.000 đồng note. Linh discovers that she now has 900.000 đồng. How much of this new total is in 50.000 đồng notes? A. 100.000 đồng B. 200.000 đồng C. 300.000 đồng D. 500.000 đồng