The phrase "a modest additional cost" is correct and usable in written English.
It can be used when discussing expenses that are not excessive and are considered reasonable in relation to the overall context.
Example: "The upgrade will provide significant benefits, and it comes at a modest additional cost."
Alternatives: "a reasonable extra expense" or "a small supplementary charge".
The BBC Trust review also noted that the BBC "should put more emphasis on targeted enforcement even if this leads to modest additional cost".
However, that decline in evasion had now "levelled off" and while the BBC had cut the costs of its collection programme by £43.5m since 2006-2007, "the BBC should put more emphasis on targeted enforcement even if this leads to modest additional cost".
In our decision model we found that incorporation of a routinely available biomarker (estimated glomerular filtration rate) to this risk score was associated with changes in the day of assigned coronary artery bypass grafting, leading to higher QALYs at modest additional cost.
This figure also shows that the guaranteed convergence of the DCFTP-SSA incurs a modest additional CPU cost.
As a result, the methodology developed can attain optimal accuracy at very modest additional costs relative to situations for which the solution is smooth.
And importantly they know this will save the state millions of dollars in the long run even as there are some modest additional costs in the short-run.
Insurers are supposed to compete for patients; those with high costs may charge a modest additional fee.
Initial data from RCTs indicate that for acupuncture and osteopathy modest clinical benefits are achievable for a relatively small additional cost [ 21, 22].
This combined approach has the advantage of improving the coverage of runtime refinement checking at modest additional computational cost, since model checkers are only used to explore thread interleavings of a small, fixed test program.
