Hi Rae,
we also need this feature as we have had in Magento. For us, we ship heavy glass. We manually calculate the shipping for our wholesale customers due to multiple boxes. The customer fills their cart, calls us for quote and we then log into their cart to see what they have in order to give accurate quote. Is there a way in Shopify that we can look to see what customers have in their carts so we can quote their shipping? This is important to us for our new Shopify store. Thank you.