Help In Adding Amount in Cells Based on Name in Another Cell

Hi Guys,

So I am having a mental blank but what I am trying to do is add Results in one column and display total amount in another column based on names.

for eg... Roofing 50000, tiling 50000, roofing, 10000
so the new column so add total roofing cost as 600000.

Help please....Example file attached.

Thanks.Help.xlsx

Thank You so much!