根据预定义的周长计算日期范围内的可计费天数

Question

I am attempting to devise a formula that will allow for the correct billing days based on a predefined week length. Take this example:

• Qty: 5
• Price Per: $1
• Date Start: 1/1/2017
• Date End: 1/7/2017
• Days Per Week: 3
• Total billed: $15

Billing on a 3 day week would mean that 1-3 days would be billed on (Qty * Price Per) but days 4-7 are essentially free. This would have to work for long period also.

More Examples:

• Qty: 5
• Price Per: $1
• Date Start: 1/1/2017
• Date End: 1/8/2017
• Days Per Week: 1
• Total billed: $10

• Qty: 5
• Price Per: $1
• Date Start: 1/1/2017
• Date End: 1/10/2017
• Days Per Week: 1
• Total billed: $10 Any help is greatly appreciated!

Answer 1

Try this:

=MIN(MOD(B4-B3+1,7),B5)*B1*B2+INT((B4-B3+1)/7)*B1*B2*B5

where:

B1: Qty

B2: Price Per

B3: Date Start

B4: Date End

B5: Days per Week

With this setup:

Breaking it down:

• lesser of number days left over after subtracting the whole weeks, or maximum number of days to count in a week MIN(MOD(B4-B3+1,7),B5)

  • multiply by Qty * Price Per

• number of whole weeks INT((B4-B3+1)/7)

  • multiply by Qty * Price Per * Days in Week