$\text { Sixteen }$ Pounds of Mixed Birdseed Sells for $7

$\text { Sixteen }$ pounds of mixed birdseed sells for $7.2 per pound. The mixture is obtained from two kinds of birdseed, with one variety priced at $6.2 per pound and the other at $7.8 per pound. How many pounds of each variety of birdseed are used in the mixture?

A) $\text { Seven }$ of the $6.2 per pound birdseeds and ten of the $7.8 per pound birdseed.
B) $7.8 of the eleven per pound birdseeds and $30$ of the $\$ 7.8$ per pound birdseed.
C) $\text { Seven }$ of the $\$ 6.2$ per pound birdseeds and $\text { eleven }$ of the $\$ 7.8$ per pound birdseed.
D) $\text { Ten }$ of the $\$ 6.2$ per pound birdseeds and $\text { six}$ of the $\$ 7.8$ per pound birdseed.
E) $\text { Six }$ of the $\$ 6.2$ per pound birdseeds and $\text { ten }$ of the $\$ 7.8$ per pound birdseed.