15g confusion

I have lot of confusion in filling 15G, please help me...

1)suppose if a person have f.y 2013-14 interest income 40,000 and salary 1,95,000 and deduction of 80C 50,000 then he can fill 15G or not?

2)if he can fill 15G then what comes in column 23 of 15G....amount 40000+195000=2,35,000 or 40000+195000-50000=1,85,000?

3)if interest from diffrent banks what amount comes in column 22 of 15G.....Total interest amount of all Bank or only interest amount of respective bank in which 15G going to be submitted?

 

4)Fdr details need to fill in Schedule-3 :-  all bank FDR detail or only respective bank FDR detail in which 15G going to be submitted?

Please help me