The majority of the volunteers were very young which may seem surprising considering the great experience we had during the stay I was wondering why there were not more older participants

Can you repeat this sentence, but add in punctuation?
The majority of the volunteers were very young, which may seem surprising considering the great experience we had during the stay. I was wondering why there were not more older participants.
3 And Jesus went up into the mountain and there sat with his disciples

Can you repeat this sentence, but add in punctuation?
3 And Jesus went up into the mountain, and there sat with his disciples:
Sometimes youll need to include tax with the sales price

Can you repeat this sentence, but add in punctuation?
Sometimes you'll need to include tax with the sales price.