More info On January 1, Brent Walker. M.D. received $32,000 cash and gave capital to Walker- On January 2, Brent Walker, M.D. purchased medical supplies on account, $18.000 On January 4, Brent Walker, M. D. performed services for patients receiving $2,100. On January 12 , Brent Walker, M.D. paid monthly office rent of $2,900. On January 15, Brent Walker, M.D. recorded $7,000 revenue for services rendered to patients on account