def calc_install(runs, cost_index, system_index, tax_rate):
    """
    Calculate total install cost for a manufacturing job.

    :param runs: Number of runs in the job.
    :param cost_index: Cost Index for the item.
    :param system_index: Cost Index for the star system where construction
           would occur.
    :param tax_rate: Tax rate for the facility where construction would occur.
           Rate should be represented as a percent. (e.g. the 10% of cost
           index tax charged in NPC stations is given as 10)
    :return:
    """
    job_fee = runs * float(cost_index) * float(system_index)
    facility_tax = job_fee * float(tax_rate) / 100
    return job_fee + facility_tax