Wanna make the most of my 2 days in Bangkok. What to do?

I am staying in Hotel White Orchid in China Town. Will reach Saturday morning and will be busy till Sunday evening. I will have 4-5 hours on Sunday, and all Monday with me. Where to go for cheap shopping and mage near China Town? I would love to buy cheap clothes and electronics. Please give details of the means of travel and the charges too. Thanks!