Estimate the sum. 369,228 + 420,577

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0