i use quick books pro for invoicing and accounting.
clean up, clean up sticks, leaves debris is the basic clean up you can cut back perennials & grass plants, rake baeds. i walk the property and think about how long it is going to take to get er done
mulching, are you edging? weeding? any removal or bed shaping? i usually go between$80-&110 per yard of colored mulch or bark mulch. i will walk the property and count off how much mulch i'll be using. i am sure some people will measure each bed and come up with the sq ' and do the calculatin depending on the depth of mulch they are using.
hope it helps