All together, these 3 documents are very rich of solving techniques.
IMHO, if interested => download the 3 ... not to miss some essentials.

Jean

Solve TREASURY_1.sm (25.42 KiB) downloaded 514 time(s).

Solve TREASURY_2.sm (53.23 KiB) downloaded 477 time(s).

Solve TREASURY_0.sm (116.61 KiB) downloaded 527 time(s).