Is this all in one box or separate boxes that total the 144 count?

Its 4 boxes with 36 bags inside each.

Your website says "Ziploc 0.5-Gal. Freezer Bags, 160-Pack" but photo shows 144. I want to confirm that I will be getting 160 bags for $23.99, correct?

It will be 160. Thank you for letting us know, we have updated the photo