export type PricedLine = {
    quantity: number;
    /** Per-unit price (major units), excluding the one-time setup fee. */
    unitPrice: number;
    /** One-time fee charged once for the whole line (e.g. digitizing/setup). */
    setupFee: number;
};
/** Total units across the cart. */
export declare const cartCount: <T extends {
    quantity: number;
}>(lines: T[]) => number;
/** Cost of one line: unit × qty + the one-time setup fee. */
export declare const lineTotal: (line: PricedLine) => number;
/** Sum of every line's one-time setup fees. */
export declare const cartSetupTotal: <T extends PricedLine>(lines: T[]) => number;
/** Cart subtotal (all lines, including setup fees). */
export declare const cartSubtotal: <T extends PricedLine>(lines: T[]) => number;