Pretty nice - one improvement I can see (at least for me) would be to have the labor, material, and equipment costs on one line for each line item. My job costing items are all on one line so I'm not trying to flip between labor, materials, and equipment for just one item - if I'm looking at a formwork item I'm seeing the labor, materials, and equipment needed for that item only and all in the same place.
Like I said - that's just the way I like to do it.
Another item that I'm not sure about (and this might just be how you set it up) is the total quantities. Like next to the Total Material Cost: you have a colored cell - is that a sum of line item quantities? If so - it may not work for all items - one could be a square foot quantity and the other could be a lineal footage. If that colored cell is building square footage then have it auto fill so nobody gets confused.
I like the layout of the pages - makes total sense.
I've attached one that I've developed which can be easily customized or downsized to be whatever you want. It also does billing (if you don't have anything to do that in) by filling in the Total to Date column only. Before doing the monthly bill copy from the TTD into the Previous column (make sure it's values only). It'll auto update current amount.
You can also modify it to add in overhead and profits to the bottom line pretty easily - I typically have those amounts already figured into the unit costs.