Add mask on matrix inputs

Further to above, can I also mask the input in these fields to show currency. I selected it as an inout put but it didn't seem to have any effect. 

When you set the input type of a matrix field to currency, all inputs will only accept numeric values. Otherwise, it will prompt an error.

Example:

By the way, the matrix field does not have input mask feature as of the moment, however you can still achieve this when you take your form source code and implement this feature.