Get instant live Excel expert help with SUM Function

Hi, I'm an excel novice and trying to work out how to get the below Sum into a spreadsheet. please help? £7.00 x 13.8% + = x 14.8% + = x 33% + =x 1% + = Charge Rate

I'm trying to sum up numbers in column 3 but only if column 2 holds a 'Y'

I'm trying to sum hours worked by staff on a Saturday, but no more than 2 hours if 38 hours have been worked during the week (Mon-Fri)

I want to know if there is a function that provides the overall amount of weight loss out of each submission in an a entire column. Just like how at the end of a column you can do the sum or the average, etc. I want it to constantly be able to provide a new number by subtracting every time I put a new number in the column.

IF i consider A,B, C as my excel column, i am trying to find the cumulative sum in my C column (for example A1+B1 = C1 in first row and then in second row i need A1+A2+B2 =C2) simillarly A1+A2+A3+B3 =C3. how can i do that using excel formula?

I am trying to do a formula where I enter the current period into a given cell and have monthly expenses entered below the month (09/30/16 in cell A1 and $50 in cell A2) and I want a sum for all expenses where the date is greater than the current period date but equal to or less than 90 days. I am trying to total the expenses for 90 days greater than the current date.

I have 2 columns one with product and the other with values $dollars values attached to the product, some of the products occur multiple times in the columns. I want to get excel to add all the values attached to a particular product. How do I do this? I used Sum(Lookup.....) but it just picks the first value, it doesnt sum all values.

Hi..I want to sum a range of data based on dates..

I am trying to sum the total by invoice number

ok I'm trying to sum a set of cells and then subtract another set of cell to return a total so (A1, C1)-(D1, K1)=