> ## Documentation Index
> Fetch the complete documentation index at: https://help.truerestore.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Time & Materials schedules and sell price

> Per-item cost and margin drive the customer price through the gross-margin formula cost divided by one minus margin.

Your company's **Schedule** is a price list of line items, each with its own cost and margin percentage, set under **Settings → Time & Materials**. Margin is set per line item rather than as one company-wide number, so you have full control over which items carry more or less margin — review your schedule periodically if you want to shift pricing broadly.

TrueRestore calculates the customer-facing **sell price** from those two numbers using a gross-margin formula: `sell price = cost ÷ (1 − margin%)`. For example, a line item that costs you **$80** with a **20% margin** sells for **$80 ÷ 0.80 = \$100.00**. Set your target margin once per item, and every estimate and invoice built from it prices itself correctly from then on.

Build an estimate on a job by adding items from the schedule with quantities. **Change orders** let you adjust the scope after the fact without touching the original numbers — a change order is its own itemized document tracked through **Draft → Pending Approval → Approved → Sent**, sitting alongside the original estimate rather than replacing it.