Hello Sir,
I checked 2 attached files , i will do step by step :
1) Make the 6 *blue* entries from the spreadsheet, then check with me it is OK. Then do the rest. ->i will do it for you
2) The vendor logo image needs to be resize to have max width of 400 and max height of 400. You can use any tool to do this. -> i use photoshop so resize it
3) The "gallery images" should use the Wordpress gallery feature. Simply click "Add Media" then "Create Gallery", and choose the images listed in the spreadsheet. -> i will add images gallery
Please chat so we can discuss now
Thanks,regards
Quoc Huy