D05 — Ivo winter cash sheet and estimate

Opening available cash is £18,000. Keep at least £6,000 at each week end. Fixed routine overhead is £1,800 every week, including ordinary staff pay. A working or maintenance vessel-day costs Kestrel £900, Morrow £1,200, Tern £650. Each scheduled maintenance period also costs £500 in parts. These are fictional accounting units; do not import maritime cost assumptions.

The initial feasible plan ends week 12 at £13,850. The lowest week-end balance is £11,250. Cash is viable but a later paid contract can still consume cash before it pays. All new cash adjustments need their own IDs. Failed work uses its attempted resources and costs without earning its success receipt.

Ivo has half a day each week available for change work after routine finance. He estimates duplicate reconstruction costs four to six hours a month for him and Mara together, with only about half likely removable. Mara's larger estimate includes work Ivo thinks cannot be eliminated. Neither estimate has been accepted as the truth.

Ivo will consider a one-off £600 internal experiment only under the precise response-card conditions. He has not authorised borrowing, credit, unpaid work, a common island maintenance fund or any promised saving. He will accept a measured failed trial if it can be closed without losing live invoices.