colculate 2 sheets

plz help me if anyone knows about it, i want to from one sheet colculate nubers another sheet, but if i delete from first sheet this numbers i want to stay calculation numbers in secont, if ist avalable can any one help me to realaze if its can be do, my point is that i want to have first sheet for work but second for remeber my colculation, means if i do my mounthly production its should plus last mounth production numbers, if i delete in my work sheet numburs ineed stay claculation numburs means ( exp. september +oct)

plz help me if anyone knows about it, i want to from one sheet colculate nubers another sheet, but if i delete from first sheet this numbers i want to stay calculation numbers in secont, if ist avalable can any one help me to realaze if its can be do, my point is that i want to have first sheet for work but second for remeber my colculation, means if i do my mounthly production its should plus last mounth production numbers, if i delete in my work sheet numburs ineed stay claculation numburs means ( exp. september +oct)