Clothing
All characters begin play with one outfit, valued at 10 gp or less. Additional outfits can be purchased normally.
Cold-Weather Outfit: This outfit includes a wool coat, linen shirt, wool cap, heavy cloak, thick pants or skirt, and boots. This outfit grants a +5 circumstance bonus on Fortitude saving throws against exposure to cold weather.
Courtier's Outfit: This outfit includes fancy, tailored clothes in whatever fashion happens to be the current style in the courts of the nobles. Anyone trying to influence nobles or courtiers while wearing street dress will have a hard time of it (–2 penalty on Charisma-based skill checks to influence such individuals). If you wear this outfit without jewelry (costing an additional 50 gp), you look like an out-of-place commoner.
Noble's Outfit: These clothes are designed specifically to be expensive and gaudy. Precious metals and gems are worked into the clothing. A would-be noble also needs a signet ring and jewelry (worth at least 100 gp) to accessorize this outfit.
If it is your outfit at the beginning of character creation, then it is 10gp. If it is an additional outfit then it is 50gp for the Courtier's and 100gp for the Noble's.
Being cold-weather does not affect the cost.
If it's first time buying, for say, a Noble's Cold Weather would you combine 10+10 gp? Or 10+100?
Curious now that you mention it BBT.
I would imagine that at the time of making it is made with thick fur and thick gloves instead of thinner material.
But, I can see what you're saying.