If you press the Insert key on the keyboard while active in a Worksheet price or discount field will toggle an overwrite effect on all pricing fields. If you find you are having the issue described below press the Insert key on the keyboard to toggle to the desired input mode.
Issue
You are hand entering numbers in one of the pricing or discount columns of Worksheet and see that only the first digit entered goes to the dollar position and the rest of the digits you enter go right of the decimal.
Example: You intend to enter $650.00 but it turns out to be $6.50
Solution
You likely pressed the Insert key or toggled the this mode from a keyboard shortcut by accident.
Click the number in the pricing field so its highlighted and ready for input.
Then press the Insert Key.
Now type the desired value.