Laidoff: CoS from H1B to B2 with approved i140

Hi,

I recently lost my job and my 60-day grace period will start from tomorrow

I am looking to apply for CoS from H1B to B2

I have an approved i140 but my visa stamp has expired

What reason to provide for CoS that doesn't raise immigration intent esp with an approved 140?

Should I show proof of funds for the COS to get approved? If yes, How much funds should I hold?

Please help!