To Glitch The Gun Powder Quest Do the following:

01. Collect 200 Bombs from Gun Powders.
02. Put them in your Storage(Yes its possible).
03. Get your reward at the Grocery Trader.
04. Accept the Gun Powder quest again.
05. Take the bombs out of your storage.
06. Shift Click the Bombs and Enter the number 1.
07. NPC the 1 bomb you have seperated.
08. Now go train and collect 1 more bomb.
09. Store all 200 in your storage.
10. Get your reward yet again.
11. Repeat Numbers 4 ~ 8 for the last time.
12. Leave the bombs in the inventory and accept the final reward.