Answer:
first part is 1.78 2nd part 17.33$
Step-by-step explanation:
You need to find the unit price first of the dog food once you found that which is . Half a dozen is 6 take the unit answer of the unit rate and multiply it by 6 and that's your answer or because 3 is half of six multiply .89 by 2. Then take 1.78 + .89 = 2.67 so minus that from 20 = 17.33$