def calculate_marginal_value(goods, selected_good, valuation_function, bids, prices):
    """
    Calculates the marginal value of a given good for a bidder in a simultaneous sealed bid auction.

    TODO: Fill in marginal value as described in the pseudocode in the assignment.
    
    Algorithm 1: Calculate the marginal value of good gj ∈ G
    INPUTS: Set of goods G, select good gj, valuation function v, bid vector b, price vector p
    OUTPUT: The marginal value (MV) of good gj
    
    bundle ← {}
    for each gk ∈ G\{gj} do
        price ← pk
        bid ← bk
        if bid > price then
            bundle.add(gk)
        end if
    end for
    MV ← v(bundle ∪ {gj}) - v(bundle)
    return MV
    """
    
    # TODO: Implement the marginal value calculation according to Algorithm 1
    raise NotImplementedError("Implement marginal value calculation") 