Capital Rationing and Project Selection

A company is evaluating several potential projects to undertake within the upcoming fiscal year. Due to budget constraints, the company has a limited amount of capital available for investment, a situation commonly referred to as capital rationing. After estimating the net present values (NPVs) of the prospective projects, the company identifies three projects:

Project A: NPV of $300,000, required investment of $500,000
Project B: NPV of $200,000, required investment of $300,000
Project C: NPV of $150,000, required investment of $250,000

The total available capital for investment is $600,000. Considering only the financial metrics and ignoring qualitative factors, which combination of projects should the company choose to maximize NPV?