In part A, you have been tasked with constructing an algebraic expression that represents the total cost of kitten supplies.
There are two types of kittens identified in the question: young kittens and older kittens. Let's say m is the number of young kittens and n is the number of older kittens.
The young kittens' food is $3.99 per bottle. The older kittens' food is $1.50 per can.

Based on the number of each type of kitten, the cost will vary.
The second part of the question asks you to identify specific parts of the equation. The coefficients are 3.99 and 1.50. There are no constants in the expression. The variables are m and n.