This is the 2510th most frequent Korean word.
막대한
"Enormous" or "immense."
Here, '막대한' is used as an adjective describing the magnitude of '이익' (profit), indicating its enormity.
그 회사는 막대한 이익을 냈다.
That company made a huge profit.
'막대한' modifies '비용' (cost), emphasizing its forbidding scale.
막대한 비용 때문에 프로젝트가 중단되었다.
The project was halted due to the enormous cost.
In this context, '막대한' precedes '지원' (support), depicting its significant contribution or amount.