Finsing Number Of Days between Start fiscal period & End fiscal period

Hi

My user enter 'Fiscal Period' in the selection period between the values(start fiscal period & end fiscal period).

I want number of days between the start fiscal period and end fiscal period. So pls let me know how can we calculate the number of days between start fiscal period and end fiscal period.

Eg:- <b>Start Fiscal Period = 01 and EndFiscal Period = 03.

Then Number Of Days Between Start Fiscal period & End fiscal Period = 92

days</b>

pls let me knw

kumar