If the rate is 60 pounds for $6.60 and we need to convert it to a unit rate per ounce, you will think of it as $6.60 for 60 pounds instead.
Divide to get a unit rate per pound.
$0.11 per pound
To convert this to an amount per ounce Change the rate to say $0.11 per 16 ounces(this means the same).
Divide 0.11 by 16 to get 0.006875 or $0.007 or 0.7 cents per ounce. Choice D but it should say per ounce, not per pound.