$60 every month by taking the bus. what is the present perfect tense of the verb “save”?

The basic proper formula for the present perfect tense is:

Subject + has/have (depended on the subject. She, he, and it will use has and you, we, and I will use have) + past participle V3 

So, I think the correct sentence would be:
She has saved $60 every month by taking the bus

Because the vietnam war was fought in an especially brutal and untraditional way