Answer:
variable cost is $2.67
Step-by-step explanation:
The variable cost per dog associated with company's water bill can be computed using the high-low method given below'
variable cost=water bills at the highest activity level-water bills at the lowest activity level/(number of dogs at the highest activity level-number of dogs at the lowest activity level)
water bills at the highest activity level is $3,600
water bills at the lowest activity level is $2800
number of dogs at the highest activity level is 500 dogs
number of dogs at the lowest activity level 200 dogs
variable cost =($3,600-$2800)/(500-200)
variable cost is $2.67