Cell,Formula,Description A1,=SUM(B1:B10),Total balance A2,=A1 - C1,Remaining balance B1,[Input from coin slot],Inserted coin value C1,[Selected item price],Price of the selected item D1,=IF(A2>=0; A2; 0),Change to return E1,=SUM(F1:F10),Total sales F1,=IF(G1>0; C1; 0),Sale amount for item 1 G1,[Stock for item 1],Current stock of item 1 H1,=G1 - IF(F1>0; 1; 0),Updated stock after dispensing