That depends. Are you using it with a Mac or a PC? If a PC, then yes, the control key on PC is like the command key on a Mac. If you're using your Dell keyboard with a Mac, then in my experience the Windows key should map to Command, and the Alt key should be Option. Report abuse.
1 Concrete price increases nationally (excluding WA) of between $8.00 and $16.50/m3 equating to around 5-9%, effective 1 April 2015. 2  Concrete price increases in WA of $12.00/m3 equating to around 6-8%, effective 1 March 2015.
Concrete retaining wall prices start around $30 per square foot including materials and installation and can go as high as $45 to $50 per square foot depending on how much prep work is involved in building the forms. Walls higher than four feet typically require a different type of form which will raise the cost.ood Retaining Wall Prices. Wooden retaining walls start at around $20 per square foot including materials and installation if using cost-effective pressure treated lumber. Hardwoods such as redwood, Cyprus or mahogany will raise the price over $30 per surface square foot but add an element of beauty to your wall.