When does moisture cause a rebate?

On the mustard physical-delivery FAQ spec, moisture rebates only when it is above the 5% basis: rebate = − base rate × (moisture − 5) × rebate ratio ÷ 100. At or below 5% there is no moisture rebate.

How are per-bag terms converted to ₹/quintal?

The ₹/bag deduction and the g/bag weight-loss allowance are scaled by 100 ÷ bag weight (kg) to express them per quintal, so they stay correct when the bag size changes.

Mustard FAQ quality parity calculator — India

Q: How is the mustard oil % rebate calculated?

Effective oil = lab oil report − 0.2% report deduction. Below the 42% FAQ basis it is a discount; above 42% it is a premium (1:1) when the premium option is enabled. Adjustment = base rate × (effective oil − 42) × rebate ratio ÷ 100.

Q: What gets a mustard lot rejected?

Acceptance gates flag the lot when effective oil is below 39%, moisture is above 7%, foreign matter is above 1.5%, or FFA is above 1%. These are editable to match your own contract.

Price a mustard / RM seed lot against the physical-delivery FAQ spec: oil, moisture and FM rebates on the FAQ base rate, then the commercial terms — cash discount, bag deduction, weight-loss allowance and unloading — to a net ₹/quintal and lot value. Every value editable to your own contract.

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What it does

Each parameter is compared to the mustard FAQ basis and converted to a rupee adjustment, then the per-bag commercial terms are folded in. It also flags acceptance gates (oil < 39%, moisture > 7%, FM > 1.5%, FFA > 1%).

The formula

Oil: effective oil = lab oil − 0.2% report deduction. oil adj = R × (effOil − 42) × ratio ÷ 100 (discount below 42%; premium above 42% if enabled).
Moisture: rebate only above the 5% basis — −R × (moisture − 5) × ratio ÷ 100.
Foreign matter: full FM% deducts (0% basis) — −R × FM × ratio ÷ 100.
Subtotal → less cash discount (% of subtotal) → less bag deduction (100 ÷ bag kg) × ₹/bag → less weight-loss allowance → less unloading = net rate ₹/quintal; × quantity = lot value.

Worked example

FAQ base ₹6,000/qtl, lab oil 42%, moisture 5%, FM 0%, FFA 1%, 85 kg bags, ₹20/bag deduction, 1% cash discount, 200 g/bag weight loss:

Effective oil = 42 − 0.2 = 41.8% vs 42% basis → oil discount = 6,000 × (−0.2) ÷ 100 = −₹12
Moisture 5% = on basis → ₹0; FM 0% → ₹0
Subtotal = 6,000 − 12 = ₹5,988
Cash discount 1% = −₹60
Bag deduction = (100 ÷ 85) × 20 = −₹24
Weight-loss allowance ≈ −₹14
Net rate ≈ ₹5,891/quintal · status: within spec ✓

How is the mustard oil % rebate calculated?

Effective oil is the lab report less the 0.2% report deduction; it is then compared to the 42% FAQ basis — a discount below, a 1:1 premium above (when enabled).

What gets a mustard lot rejected?

The calculator flags effective oil below 39%, moisture above 7%, FM above 1.5%, or FFA above 1% — all editable to your own contract.

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