No. Please see Historical inventory.
Unfortunately not, because it's not provided by the Shopify API.
See Showing staff names
See Cost of Goods Sold
Yes, as long as you have connected each of your stores to Better Reports. Please reach out to firstname.lastname@example.org and let us know the shop domains that you need to link together. Also, do let us know the store that should be considered the master store. Once linked, whenever you open Better Reports from the master store, you will notice an additional field Store, which you can use to segment and filter your reports for any of your stores. If your stores sell in different currencies, we can also work with you to create custom measures that convert your sales to your primary currency (you will need to supply the FX rates to be used when converting from a secondary currency to your primary currency).
No. Better Reports is only authorized with read-only permissions. It cannot update anything on your store.
Yes. Markdown can be computed using the difference between the variant 'Compare at price' and the 'Price'. A caveat is that whenever the 'Compare at price' is updated, all historical markdowns are immediately impacted. That is because Shopify doesn't record a historical 'Compare at price', at the time of the sale. Only the current/latest 'Compare at price' is accessible. Reach out to our friendly staff at email@example.com so we can create custom markdown metrics for your store.
No, simply because Shopify doesn't provide shipping label data in their API. However, it is possible to create a shipping cost metric if it is calculated a formula (usually based on order weight and / or shipping address). To create a formula-based metric, please reach out to firstname.lastname@example.org