Editing Trinity:City Mechanics (section)

===An Example===
 Edge has a Wealth of 14 and Population 52, meaning that it's Max GP Limit is 728 GP. 
 
 However, Edge recently suffered an explosion in its industrial sector (+38 to Disaster), which resulted in a loss of 38 Content,
 Infrastructure, and Resources; a loss of 19 in Leadership and Economy; and a loss of 9 to all other attributes.
 
 '''Max Item GP:''' Resources is now 38 points lower, resulting in a 38% drop in Max GP. The new max GP Limit is 451.3 gp.
 
 '''Currency Value:''' Economy is 19 points lower, to a 16; this results in a 3% drop in currency value. To purchase an item of the
 max GP limit (451.3 gp), a person must spend 465.3 gp.
 
 '''Item Availability:''' Infrastructure took a 38 point hit; Edge's original Infrastructure was 35, and is now 16. Items with an
 item availability of 17 or higher are no longer available.
 
 Let's now say that a character wants to purchase breastplate in Edge (35 availability).
 
 Edge has the Craft (Blacksmith) skill, which is what is required to make breastplate. Breastplate's base GP value is 200 gp, lower
 than Edge's current max GP limit. So the item can possibly be found, but will be (even) more expensive than normal.
 
 Edge's Craft (Blacksmith) is +7, x 5 is 35. 35 is equal to or higher than the item's availability, so the item can be found.
 
 Edge's Economy is 16. 35 - 16 = 19, which is greater than 0, so the item can be found. This is subtracted from the currency
 value, resulting in currency's value being 22% of normal in regards to buying the breastplate.
 
 To purchase the breastplate, currency is treated as 78% of its normal value, meaning that one will need 256.4 gp to purchase the
 breastplate.