Sales of quilt covers at Bud Banis's discount department store in Carbondale over the past year are shown below. Management prepared a forecast using a combination of exponential smoothing and its collective judgment for the $4$ months $($March$,$ April, May, and June$)$:

$\backslash$table$[[$Month$,$Jul,Aug,Sep,Oct,Nov,Dec,Jan,Feb,Mar,Apr,May,Jun$],[$Unit Sales,$100,93,94,110,120,120,92,83,100,94,90,112],[$Management$\text{'}$s Forecast,$-,-,-,-,-,-,-,-,120,114,110,110]]$

a$)$ MAD for the forecast developed by the management's technique $=$ sales $($round your response to two decimal places$).$