import type { InventoryTurnoverInput, InventoryTurnoverResult } from './types.js';
/**
 * Calculate inventory turnover metrics.
 *
 * turnoverRatio = COGS / avgInventory
 * daysOfSupply = periodDays / turnoverRatio
 * gmroii = grossMargin / avgInventory × 100
 *
 * @param input - COGS, average inventory, and optional gross margin
 * @returns Turnover ratio, days/weeks of supply, and GMROII
 */
export declare function inventoryTurnover(input: InventoryTurnoverInput): InventoryTurnoverResult;
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