Clear and begin 1-variable entry
Enter a 1-variable value
Remove a 1-variable value
Enter multiple 1-variable values
Remove multiple 1-variable values
Clear and begin 2-variable entry
Enter a 2-variable value
Remove a 2-variable value
Enter multiple 2-variable values
Remove multiple 2-variable values

[ STAT ] { CLR } { CS1 }
x [ ∑+ ]
x [ INV ] [ ∑+ ]
[ STAT ] n { FRQ } x [ ∑+ ]
[ STAT ] n { FRQ } x [ INV ] [ ∑+ ]
[ STAT ] { CLR } { CS2 }
x [ x~t ] y [ ∑+ ]
x [ x~t ] y [ INV ] [ ∑+ ]
[ STAT ] n { FRQ } x [ x~t ] y [ ∑+ ]
[ STAT ] n { FRQ } x [ x~t ] y [ INV ] [ ∑+ ]