Staffing Question

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I was wondering if anyone could give me an idea for how many engineers and researchers I should have at the beginning of 1954. Currently, with the staff I have, I am making about 5,500 funds a year. I just finished Early Rocket Development on breakneck and am about to finish up Suborbital Research on fast. I feel like I have a lot more staff than I need and its eating into by budget and was wondering if anyone could give me an idea on when exactly I should increase my staff.