The phrase "added a substantial amount" is correct and usable in written English.
It can be used when discussing an increase or contribution to a quantity, value, or resource in various contexts, such as finance, research, or project management.
Example: "The team added a substantial amount of data to the existing database, which improved our analysis capabilities."
Alternatives: "contributed a significant amount" or "increased the total considerably."
After seeing the short entry on Ms. Barker, Ms. Gardner added a substantial amount of background.
And the publishing of the sister title will have added a substantial amount of red ink to the accounts.
It added: "A substantial amount of public money would have been saved had the president raised his concerns in time".
The report added: "A substantial amount of work remains to be done to prepare for a planning inquiry, which would not be expected to start before spring 2008 and is unlikely to conclude before 2010".
Apple has added a substantial amount of additional photo editing options to iOS 8. Once you have taken your photo, select Edit in the top right hand corner and at the bottom of the screen tap the third icon from the left, which looks like a small control knob.
But sophomore D.J. Moore made some tough catches and big plays this spring, and he's added a substantial amount of muscle to his frame.
"When you look at the flat land, and the amount it would cost to excavate and remove the dirt, the cost of the foundation to build a basement just adds a substantial amount to the cost of a new home," Mr. McCarty said.
Since the human body on average contains around 4 g of iron, a single dose of ferumoxytol adds a substantial amount of iron to the whole-body iron pool in a very short amount of time.
He adds a substantial amount of contributions have come from non-profits that have purchased solar panels on behalf of their organization or its members, as well as idealistic parents who are giving the solar panels as gifts to their very young children.
If that were the case, and all Deliveroo's ~15,000 riders in the UK were given worker status, Warne said it would add a "substantial" amount of cost to the business — saying this would shake out to around an additional £1 to delivery costs per hour.
They add a substantial amount of extra cost to an already expensive procedure.
