Already committed cases — reserve parts first
Enter cases already promised or planned using the parts currently on hand. Available printed parts are assigned to these commitments first. Filament is reserved only to print missing pieces; already-printed pieces do not reserve any filament. These are not deducted from physical inventory until you record completed committed production.
Additional production — all nine configurations
These are additional cases beyond the committed quantities above. Their purchasing requirements are calculated after reserving materials for committed cases. No inventory changes until a production action is recorded.
Required parts and printing
The Make / buy column includes committed and additional cases, giving priority to commitments for already-printed parts. When you record production, those missing pieces are treated as printed from filament, then immediately assembled.
| Part | In stock | Needed | Make / buy | Left after |
|---|
Additional purchases needed (committed + new)
| Supply | Purchase | Cost | Left after build |
|---|
Use this only when the full purchase arrives. Purchasing adds spines, hardware and filament to stock; it does not print parts or assemble cases.
Record additional production
Deducts stocked printed parts, magnets, bolts, nuts and spines. Missing printed pieces use raw filament only if not already printed. Committed parts and any filament needed for missing committed pieces are protected. If any raw material or hardware is insufficient, the operation is blocked—no negative inventory.
Independent stock capacity by SKU
As in your earlier Google Sheet, each maximum assumes all current printed-part and purchased-part stock is assigned to that one variant. These maxima cannot all be produced simultaneously. Filament that has not yet been printed is excluded.
| Variant | Max stock-only | Limiting component |
|---|
Exact bill of materials — 20 parts × 9 variants
Case inventory — finished vs. committed
Finished means physically assembled and ready to sell. These do not need more parts or filament. Committed means cases still to be built; each reserves the corresponding parts already in inventory and requires additional parts for shortages. For missing printed components only, the calculator reserves the filament required to print them. Additional target cases are separate and are calculated after commitments. You may edit either inventory directly below.
| Case variant | Finished / assembled | Committed / not assembled | Additional target |
|---|
Raw filament inventory
Edit your physically available filament in grams at any time, including partial spools. Changes save automatically when you leave the field. Printed components have separate inventory; their filament should not also be counted as raw filament.
| Filament | Grams in stock | Needed to print planned parts | Projected after build |
|---|
Part inventory (same 20 categories as spreadsheet)
Edit any On hand field at any time. Changes save automatically in this browser when you leave the field. Record production through the planner rather than manually changing stock whenever possible.
| Part | Type | On hand | Needed for targets | Shortage | Projected left | Status |
|---|
Finished case inventory — quick edit
These are assembled and finished units only. They do not reserve components. Editing here also updates the finished column above.
Supplier prices, bundle rules & tax
Prices entered for all filament and purchased hardware include applicable taxes. SendCutSend spine-only tax is added at the editable rate below. Filament prices are per spool, not per bundle. Spine tiers are per individual spine and do not force extra pieces.
SendCutSend spine quantity discounts
Any integer purchase quantity permitted. Rates are applied to the quantity actually ordered. For one spine, the two-piece rate is used as an estimate because a one-piece quote was not supplied.
Inventory activity log
Every purchase receipt and completed production action is logged locally. Export backups to protect your history.
| When | Event | Details |
|---|
Assumptions: print material weights from the previous product reference; no supports, waste, purge, failures or labor included. Spine prices from supplier screenshots. Filament fixed purchase bundles: ASA 4; black 4; silver 2; blue and red paired 1+1. Magnet, bolt and nut packs: 120/500/200. This app stores data in this browser only, not on Hostinger's server or shared between devices.