One nice feature of PayPal invoices was the ability to add/update the line you're working on directly to your product list on the fly.

Hide rows in a pricing table

Show different totals for different product types in a pricing table. Depending on cell's value and column.

Customer was interested in having more pricing table variables to choose from for other columns outside of the Footer rows. (Such as specific items under Price column etc.)

Ability to have product description in the pricing table pulled from HubSpot in a way it is inside the HubSpot in the product description. ex: Bulleted points.

Resize text, pricing table/table like an image block in blank page & cover page

Ability to set up default tax for the pricing table

The ability to lock a section of the pricing table so that users have access to edit a column within the table but admins have the ability to lock certain columns down.

Allow users to add the Cost of Goods as a column in a pricing table.

Possibility to change subtotal/total manually.

ability to have a check box to make an entire pricing table optional

The option to calculate percentage of a particular number.

It would be a great feature to allow users to change the currency and have the option to enter in the current conversation rate to therefore calculate the price in the pricing table. For example Product 'A' is 100 GBP but I would like the price to update to USD. There should be a field to enter the conversation rate for example 1.31 by doing so the price for product 'A' would update to 131.31 USD.

Wants to enter one product list in USD and then when change currency, it updates with the exchange rate (europe and asia mainly). see having 10-15 currencies needed over the next few years

The possibility to merge the upper cells in a pricing table rows, which usually say Price, QTY, Name etc.

Prorated invoice option (automatic). The option that allows automatically calculate the part of the whole price of the product based on the time period.

Implement the same functionality for a pricing table section as the "Optional item" for a pricing table's item (be able to check/uncheck the checkbox on the pricing table's section level [for all the items in the section at once])