The phrase "together contribute" is correct and usable in written English.
It can be used to refer to two or more people working together to make a contribution. For example, "Tom and Sarah together contribute to their local food bank every month."
Currently, central and local government together contribute at least £11.8bn to charities each year.
They are unbelievable, extraordinary young people who together contribute hundreds of thousands of hours of voluntary work a year".
They argue that genes and cultural conditioning work in tandem and together contribute to the formation of individual personalities.
Specific initiatives in Queensland included improving "early diagnosis, treatment and management of the diseases and conditions that together contribute to 80% of the health gap".
The SEIU and the Teamsters together contribute around $20m a year in dues out of the federation's total budget of $125m.
South Australia and the federal government will together contribute $1.1bn in extra school funding to the state over the next six years and the Australian Capital Territory will receive an extra $190m.
Atomic arrangement, lattice mismatch relationship, and competition growth all together contribute to the growth mechanism.
All these together contribute to the fast wound healing while using electrospun membranes as skin substitutes.
The logical and textual metafunctions together contribute to the coherence of a text.
The absorption spectra of FePt and PPy may together contribute to that of FePt@PPy NPs.
These two subsystems together contribute from 40%to92%2% to the overall impact depending on the impact categories.
