This appears to be shopping for two people in two hands with two pens.
They are working age dog and cat owners with no children.
On P’s side of the list we have chicken, weetabix, French fries, custard creams, cokes and tissues. On G’s side we have duck in plum, chick/mushrooms, cold puds (eclair), trifle, lattes, cookies and chocs.
Some items have been crossed off, some have been circled. Some items in capitals and some in lower case. Notice the change of pen between hand wash and pads/pants.