Is it possible to have some tabs in a workbook set on manual calculate mode and others on automatic?

I have a workbook consisting of 20 tabs. 14 of the tabs are pretty much data entry tabs, 3 of the tabs are summary report pages, and lastly I have a few large helper tables on three "Calc" tabs that involve some volatile formulas. When the workbook is set to calculate automatically, the "Calc" tabs are causing a huge slow down.

For the day to day operation of the workbook, only the 14 data entry tabs are used by the data entry person, but are hindered by the large calculation time involved with the "Calc" sheets. Setting the whole workbook to calculate manually cuts the calculation delay time, but makes the data entry process extremely difficult because the cells with formulas do not auto-populate.

The ability to have some tabs calculate automatically, and others not, would be wonderful, but I don't know if that is possible.

Any thoughts?