When you put textinput fields on a form, set input to Number, connect it to a Number Field in your collection AND GIVE IT DEFAULT NUMERIC VALUES, the values are written to collection as TEXT, not as Number if:
default numeric values are accepted by user (so without manual change)
manually input values ARE EQUAL to defaut values
and then look at collection Inquiries.
I will do a conversion to numbers on the onBeforeSave, but this should not be necessary.