It is hard to tell without seeing the rest of the code but I believe you can use a variable to store the total cost of floors from 1 to c outside the loop and keep adding the overall floor cost to it.
% I assume there is some way to input the number of floors and areas for
% each floor but I just used sample values here.
nFloors = 3;
RunningBuildingCost = 0;
for c = 1:nFloors
ResidentialArea = 1;
OfficeArea =1;
EducationalArea = 1;
ToiletArea = 1;
StorageArea = 1;
%%
choice9 = questdlg('Would you like to calculate costs for spaces?','question','yes','no','yes');
switch choice9
case 'no'
disp('not calculating cost')
case 'yes'
ResidentialCost=input('Please enter the building cost for residential spaces per m^2: ');
OfficeCost=input('Please enter the building cost for office spaces per m^2: ');
EducationalCost=input('Please enter the building cost for educational spaces per m^2: ');
ToiletCost=input('Please enter the building cost for toilet spaces per m^2: ');
StorageCost=input('Please enter the building cost for Storage spaces per m^2: ');
if ResidentialArea<=0 || ResidentialCost<=0
TotalResidentialCost=0;
disp('No cost for residential spaces')
else
TotalResidentialCost= ResidentialCost*ResidentialArea;
disp("Your total cost for floor "+c+" residential spaces is:"+TotalResidentialCost)
end
if OfficeArea<=0 || OfficeCost<=0
TotalOfficeCost=0;
disp('No cost for office spaces')
else
TotalOfficeCost= OfficeCost*OfficeArea;
disp("Your total cost for floor "+c+" office spaces is:"+TotalOfficeCost)
end
if EducationalArea<=0 || EducationalCost<=0
TotalEducationalCost=0;
disp('No cost for educational spaces')
else
TotalEducationalCost= EducationalCost*EducationalArea;
disp("Your total cost for floor "+c+" educational spaces is:"+TotalEducationalCost)
end
if ToiletArea<=0 || ToiletCost<=0
TotalToiletCost=0;
disp('No cost for educational spaces')
else
TotalToiletCost= ToiletCost*ToiletArea;
disp("Your total cost for floor "+c+" toilet spaces is:"+TotalToiletCost)
end
if StorageArea<=0 || StorageCost<=0
TotalStorageCost=0;
disp('No cost for storage spaces:')
else
TotalStorageCost= StorageCost*StorageArea;
disp("Your total cost for floor "+c+" storage spaces is:"+TotalStorageCost)
end
OverallCost=0;
OverallCost=TotalStorageCost+TotalToiletCost+TotalEducationalCost+TotalOfficeCost+TotalResidentialCost+OverallCost;
disp("Your running total for floor "+c+" is: "+OverallCost)
end
%%
RunningBuildingCost = RunningBuildingCost + OverallCost;
disp("Your running total for floors upto "+c+" is: "+RunningBuildingCost)
end
