The phrase "a significant sum in" is correct and usable in written English.
It can be used when discussing a large amount of money or resources in a specific context, such as finance or budgeting.
Example: "The company invested a significant sum in new technology to improve efficiency."
Alternatives: "a considerable amount in" or "a large sum in".
An abortion there costs about $15, a significant sum in Kenya.
The program gives poor families insurance of up to $6,950 in hospitals, a significant sum in India.
Pretty soon, others started collections, and eventually the town raised $1,800, a significant sum in 1947.
When she "messed up the forms" for her employment and support allowance medical last summer – losing her a significant sum in benefit – her finances suddenly became precarious.
Eaglesham, 35, who lives with his wife and children in Taunton, Somerset, is likely to receive a significant sum in damages, possibly more than £1m.
Each monitor received about $5 in Western-provided money, a significant sum in a country where the average monthly wage is less than $30.
Growing concern in the City about Britain's possible exit from the European Union has been underlined by the fact that the Wall Street firm Goldman Sachs had pumped a significant sum into the campaign for staying in.
We raised more than $50,000.00, a significant sum even in today's dollars.
Banking on Mrs. Clinton's increasingly likely victory in the Democratic primary contest, and those pledges, the group has begun reserving $125 million in television and digital advertising for the general election campaign — a significant sum this early in the race.
However, prosecutors say that Webber, after turning professional, gave Martin "a significant sum of money, in cash, as a partial repayment".
He said he would be seeking to force Purdue to pay a "significant" sum for engaging in marketing practices that downplayed the addictiveness of its drugs, allowing it to earn billions of dollars while fuelling the opioid crisis.
