Answer:
a.

b. $225
Explanation:
Let Mr. Scruggs got money for his birthday be 'a'
He spent
of it on dog treats = a Ă—

=

remainder amount would be = a -

=

Then he divided the remainder money equally among 3 favorite charities.

=

a. Each charity receive
b. If he donated $60 to each charity.


a = $225
Mr. Scruggs received $225 for his birthday.