Tiered-Weight Shipping Charge — Weighted Result Mean

Choose this endpoint when you need a single weighted aggregate figure for tiered-weight shipping charges across multiple retail records — specifically when records should contribute unequally to the mean based on volume, frequency, or priority. This is distinct from a simple average (no weights), a distribution summary, or a trend analysis. Ideal for blending heterogeneous shipping tiers into one representative rate for pricing models, carrier comparisons, or budget forecasting, using up to 200 supplied records with no live carrier rate access required.

• Fewer than 2 rows or weights provided — minimum array length not met
• Mismatched array lengths between rows and weights — validation error
• Numeric values exceeding maximum bounds (1,000,000,000,000) — schema rejection
• Missing required fields (base_charge, parcel_weight, included_weight, extra_weight_rate) in any row — 400 error
• More than 200 records submitted — exceeds maxItems limit
• Non-numeric values in numeric fields — schema validation failure