One lady is looking at a blue box while the shorter lady is looking at something on her phone at the grocery store.
one lady looks at a product while another looks the product up on her phone
Just because she is looking at a blue box does not mean it is a product, and just because the other lady is looking at her phone does not mean she is looking the product up.
One lady  looking at a blue box while the shorter lady looking at something on her phone at the grocery store doesn't mean that another lady  looks the product up on her phone.
Just because one lady is looking at a blue box while the shorter lady is looking at something on her phone at the grocery store, doesn't mean the lady looks the product up on her phone.