Currency

There are two types of money: Silver (Ag) and Gold (Au). Each robot and item costs either Silver or Gold. The better the robot or item, the more Silver or Gold it will cost. Gold is used for the best items. Money can also be used to Upgrade.

Silver
Silver is used to buy equipment and robots. It can also be used to upgrade items to higher levels. Silver is awarded for a variety of accomplishments during battles, including capturing Beacons, dealing out damage to the enemy, and other things. Additional Silver can be purchased in the game by spending Gold.
 * 500K Silver for 250 Gold
 * 1,500K Silver for 650 Gold
 * 5,000K Silver for 2,000 Gold
 * 15KK Silver for 5,600 Gold
 * 50KK Silver for 18,500 Gold

Gold
Gold is used for the best equipment and robots. It can also be used to speed up upgrades. Gold is earned during battles by being on the winning team and winning medals. Addition Gold can be purchased by spending money.
 * 500 for $4.99
 * 1,200 for $9.99
 * 2,500 for $19.99
 * 6,500 Gold for $49.99
 * 14K Gold for $99.99