FOREX-Dollar retains gains on jobs boost, but dips vs yen

The dollar retained most of its gains against a basket of currencies on Monday but lost ground to the yen as Japanese exporters and short-term speculators took advantage of its jump the previous session on U.S. jobs data.

* Investors mull whether dollar buying will last

* Dollar slips vs yen partly on Japanese exporter selling

* But risk of dollar/yen drop seen fading

* Fed Reserve meeting, retail sales to be focus >>