Seems like your master's is not a top up degree.M
My bachelors is 3 years and not 4 years.
Total credit hour - 360
And my masters, total credit hour - 180
Will they evaluate as masters? Based on my 3 years bachelors study
180 credit is generally the norm for a normal Master's, thus you need to do the ECA only for your Master's.
Tip- if it is not hard for your to get transcripts for your Bachelor's , their is no harm in you evaluating both the credentials as WES charges a one time fee only irrespective of the number of credentials unlike other ECA bodies.