def reprocessing_yield_percent():
    # reprocessing skills
    process_skill = 5  # reprocessing skill level
    efficiency_skill = 5  # reprocessing efficiency level
    ore_skill = 4  # refining skill level for particular ore
    implant = 0  # [0, 1.0] as the bonus percentage, eg 0.04 for 4% implant

    # location/rig modifiers
    citadel_base = 0.50
    athanor_bonus = 1.02
    tatara_bonus = 1.04
    hs_modifier = 1.0
    ls_modifier = 1.06
    ns_modifier = 1.12
    t1_rig_bonus = 1.02
    t2_rig_bonus = 1.04

    # 0.582624
    t1_null_athanor = citadel_base * athanor_bonus * ns_modifier * t1_rig_bonus
    # 0.605696
    t2_null_tatara = citadel_base * tatara_bonus * ns_modifier * t2_rig_bonus

    structure_base = t1_null_athanor

    yield_amount = structure_base * (1 + process_skill * .03) * \
                                    (1 + efficiency_skill * .02) * \
                                    (1 + ore_skill * .02) * \
                                    (1 + implant)
    return yield_amount