Question 170326
Day          1;     6;     16;    22;    30

balance($)   550;   285;   210;   210;   175
Days 1 to 6:
(550-285)/5=-$53 per day. THE GREATEST DAILY DECREASE.
Days 6 to 16:
(285-210)/10=-75/10=-$7.50 per day.
Days 16 to 22:
(210-210)/6=0/6=$0 per day.
Days 22 to 30:
(210-175)/8=-35/8=-$3.38 per day.