Depends on your interest. Assuming you get 0%, and want to pay it off in 12 months, then:
( $1199 + tax + shipping ) / 12
Most people here, myself included, would advise against putting anything on credit if it's the only way you can afford something.
EDIT: your scheduled minimum payments will NOT be 1/12th of the purchase price, but probably somewhere closer to $30-$50, so if you only make the minimum payments you will NOT pay the machine off in 12 months, and WILL end up accruing hefty interest. I believe the Barclay card is something like 22% - which is pretty dang high.