question: to begin your free file analysis, simply drag-and-drop your a3k file inside the dotted lines below, or click "browse my computer" and select your file.
Capitalize this past sentence correctly.
A: To begin your free file analysis, simply drag-and-drop your A3K file inside the dotted lines below, or click "Browse My Computer" and select your file.

question: the price set by a medical cartel would then be $30,100.
Capitalize this past sentence correctly.
A: The price set by a medical cartel would then be $30,100.

question: after laying the mines the boats bumped into a british motorlaunch (ml 130), which was fought down in four artilley-runs, although it was armed with a 76-mm-gun and two 20-mm-machineguns.
Capitalize this past sentence correctly.
A: After laying the mines the boats bumped into a British motorlaunch (ML 130), which was fought down in four artilley-runs, although it was armed with a 76-mm-gun and two 20-mm-machineguns.