One serving of Lucky Charms contains $10\%$ of the percent daily values ( PDV) for calcium, $25\%$ of the PDV for iron, and $25\%$ of the PDV for zinc.

One serving of Raisin Bran contains $2\%$ of the PDV for calcium, $25\%$ of the PDV for iron, and $10\%$ of the PDV for zinc.

Determine the number of servings of each cereal required to get $50 \%$ of the PDV for calcium, $225 \%$ of the PDV for iron, and $150 \%$ of the PDV for zinc.

We need servings of Lucky Charms, and servings or Raisin Bran.