Managerial economics

Snoopy and Woodstock both need to have some letters typed and some carpets vacuumed. The following table describes how much each of them can accomplish in one hour if that hour is spent either typing or vacuuming: 

Letters   Typed in 1 Hour:

Rooms   vacuumed in 1 Hour:

Woodstock:  

3 letters

2 rooms

Snoopy:  

4 letters

6 rooms