Surveyed and estimated break-even-point to see where the operation cost and profit would cancel each other as a last step of start-up portfolio.

a) surveyed and estimated break-even-point to see where the operation cost and profit would cancel each other as a last step of start-up portfolio.
b) surveyed and estimated break-even-point to see where the operation cost and profit would cancel each other as a last step of start-up portfolio.
c) surveyed and estimated break-even-point to see where the operation cost and profit would cancel each other as a last step of start-up portfolio.
d) surveyed and estimated break-even-point to see where the operation cost and profit would cancel each other as a last step of start-up portfolio.