Formula needed for Stats

Hi,

I need to do some statistic Analysis and need some help wtith IF formula, see example attached -

1) In Schedule Tab , if Peter has "NY/AP" on 7Sept, individual Tab Volume for Peter for 7 Sept will be pulling the Sum of G6 and H6 (i.e the same column for 7sept).
Whoever hsa "NY/AP" will have the same apply - see all those in yellow
Hence User will only need to input the date in G6 and H6 and info will auto populate in B6



2) I need a formula that will pull info into Desk Vol tab for column B "LDN" automatically based on
For Schedule tab , if for the same date, it is reflected as "L", then the number indicated in "Individual Tab' for the same person will be included in the vol for Desk VOl
Example for 1 Sept
Schedule Tab - Peter , JOhn, Jan and Ken have "L" (only Mandy doesnt)
Hence their Volume within Individual tab will be SUM up . This will then be added with I2
I.e (10 +2 +3 + 60) = 75 + 60(I2) = 135 (in green)

Another example for 2Sept
Peter + John + Jane + Mandy = 9+6+3+9 = 27 +70 (I3) = 97

Thanks!!

In the "Individaul Vol" tab, where are you getting the values under each name? On Sep 1st, how did you get "10" for Peter, and "2" for John, and so on?