Add punctuation: How much does shipping to my country cost
A: How much does shipping to my country cost?

Add punctuation: To handcompute just one of these trajectories took 30 or 40 hours of sitting at a desk with paper and a calculator
A: To hand-compute just one of these trajectories took 30 or 40 hours of sitting at a desk with paper and a calculator.

Add punctuation: You can also cancel your participation in particular services of the BERNINA website such as the newsletter service at any time
A:
You can also cancel your participation in particular services of the BERNINA website, such as the newsletter service, at any time.