Apply a discount at checkout结账时套用折扣

Promotions, vouchers and negotiated prices — and the order they apply in, which is why a total sometimes surprises people.促销、代金券与议价——以及它们的先后顺序，这就是总额有时会出乎意料的原因。

这篇指南的正文目前只有英文版。标题、摘要与导览已翻译；内文仍在翻译中。

There are three ways a family pays less than the catalogue price, and they stack in a fixed order. Knowing that order is the difference between explaining a total confidently and guessing at the counter.

Promotions

A promotion is a discount the academy is running: time-limited, applied to particular package types, sometimes limited to particular kinds of student. Use Apply promotions on the cart line.

Promotions are discount-only. There is no surcharge.

Vouchers

A voucher is issued to a family — a fixed value, with its own validity dates, sometimes tied to one child. Use Apply vouchers on the line.

A negotiated price

Some academies allow staff to type a base price (before SST) in place of the catalogue price. Where that is switched on, the typed figure *replaces* the catalogue price as the starting point — discounts come off it and SST is charged on what remains.

Reset to catalogue puts it back.

The order they apply in

1. The base price — catalogue, or negotiated if allowed.
2. Percentage discounts first.
3. Fixed-value discounts after — so a voucher comes off the already-reduced figure.
4. SST is calculated on what is left.

This is why a 20% promotion plus a RM50 voucher is not the same as RM50 off then 20%. The system always does it in this order, so two staff pricing the same cart get the same answer.

The receipt keeps what was actually charged

Every discount is written onto the invoice line as its own row, with the amount it took off, at the moment of sale.

This matters when you later edit a promotion. Changing a promotion from 8% to 10% changes it from now on. It does not touch a single package already sold — open one from last month and the breakdown still shows the 8% that the family actually paid.

Reading the total back to the parent

The cart shows each step: the subtotal before tax, the discount, the SST, and the amount due. Read it in that order and the parent can follow it.

If they hold account credit from a previous cancellation, it is applied at the payment step — after all of this — and reduces the cash you collect, not the value of the sale.

Related: Sell a package · Run a promotion · Issue a voucher.