## 1. Initial Reacting to SP

### Case #1: Seller negotiate SP #1 to "Guest user"
Guest view of SP #1:
Since seller add SP#1 is by default accepted by "Guest user" so no seller edit(Blue color and Blue underline) redlining for "Guest user" view.

### Case #2: Seller with SP #1 and "Buyer WB" w/o SP negotiation(first round)
"Buyer WB" view of SP #1:
SP #1 => Blue color and Blue underline.

### Case #3: Seller with SP #1 and "Buyer WB" w/ SP #2 negotiation(first round)
"Buyer WB" view of SP #1 and SP #2:
SP #1 => Blue color and Blue underline.
SP #2 => Blue color and Blue strikethrough.

### Case #4: "Buyer WB" with SP #1 and seller w/o SP negotiation(first round)
Buyer view of SP #1:
SP #1 => Blue color and Blue strikethrough.

## 2. Propose to add new SP

### Case #1: Guest user add new SP #1 to seller
Seller view of SP #1:
SP #1 => Red color and Red underline.

## 3. Propose to delete SP

### Case #1: Seller propose to delete "Guest user" added SP #1
Seller view of SP #1:
SP #1 => Blue color and Blue strikethrough

### Case #2: Seller propose to delete "Buyer WB" added SP #1
Seller view of SP #1:
SP #1 => Blue color and Blue strikethrough

### Case #3: "Buyer WB" propose to delete Seller added SP #1
"Buyer WB" view of SP #1:
SP #1 => Red color and Red strikethrough

### Case #4: "Guest user" propose to delete Seller added SP #1
"Guest" view of SP #1:
SP #1 => Red color and Red strikethrough