Help with Date Range on a formula

Hi everyone,

I am a little out of my depth on this one so would really appreciate some help with the attached basic CRM sheet.

At the moment we are keeping a running total of leads / conversion rates etc which you should see at the bottom of the grid.

What I would like to add it the same next to this but for the previous 7 days, a summary u think would be :

Quote Past 7 Days ( CountA in column J only if in 7 day range )
Conversions Past 7 Days ( countif " converted "in column m only in past 7 days range )

I would be able to figure the rest I hope

Sorry if this is obvious but its a little beyond me atm and really appreciate some support