While playing a real-time strategy game, Chris created military units for battle: long swordsmen, spearmen, and crossbowmen. Long swordsmen require 30 units of food and 15 units of gold. Spearmen require 40 units of food and 35 units of wood. Crossbowmen require 35 units of wood and 45 units of gold. If Chris used 1575 units of gold, 2100 units of wood, and 2300 units of food to create the units, how many of each type of military unit did he create? Need to find long swordsmen, spearmen, and crossbowmen.