record item in input or formula mode decide or change mode in runtime ?

I have a data recordblock in Forms

I can define a record-Item as a simple Input record-Item

or in a Calculation Mode as a formula  display-only record-Item

i want to define this mode / the record-item different every record in depends on of some parameters

for ex. there are 10 records in this block

first situation

the Item in the 1. , 5. and 8. record should be work in Calculation Mode ( copy value from another item in the same record )

all others items in record 2,3,4,6,7,9,10 should work in input mode

second situation

the item in 2. and 6. record should be work in Calculation Mode

all other in input mode