Funding an LLC through the contribution of property

Three of us are forming an LLC (pass-through or corporate TBD) to do
consulting. Only one guy has a decent laptop and the other two would
have to buy new ones as soon as the business starts. Let's say each
cost $3.5K (the top of the line MacBook Pro). How much initial capital
money each of us should contribute to have a "fair" equal part in the
business. The existing laptop can be contributed as a transfer of
property if needed. TIA.

Gordon

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