How to solo Gold Fury

The different color price is basically a separator, if they were all yellow it would seem a little bit odd.

The start of a game is a perfect example to give, in Assault Mode you have enough gold at the start to fully complete an item, would you rather those 3 prices be yellow? Or the colors they are now to signify upgrades?

A god's magical and physical protection values will reduce the amount of damage the corresponding types of damage apply. A god's inherent protections scale with level. For example, Ymir's total physical protection is 23 + 3.3 × level + Physical Protection From Items. Ignoring penetration for now, the formula is:

Actual damage = (unmitigated damage × 100)/(100 + protection value)

The result of this equation means that a protection value of 50 will reduce damage by 33%, 100 will reduce it by 50%, and 150 will reduce it by 60%.

For example (still ignoring penetration), if Ra's Celestial Beam is listed as doing 400 damage, and he hits someone with 70 magical protection, then the actual damage will be (400 × 100)/(100 + 70) = 235.

http://smite.gamepedia.com/Damage#Defense_and_Mitigation