The following information from LA income statement for the past three years is available

$202420232022$

Ticket Revenue. $ $1,731$ $ $1,6421,120$

Concenssions Revenue $792687411$

Total. Revenue $ $2,523$ $ $2,329$ $ $1,531$

Cost of Goods Sold $$ Tickets $ $951$ $ $854$ $ $549$

Cost of Goods Sold $$ Concessions $706948$

Total Cost of Goods Sold $ $1,021$ $ $923597$

Gross Profit $ $1,502$ $ $1,406$ $ $934$

a$.$ Calculate. Gross profit. Margins for. Tickets and concessions for all three years. Calculate an Overall gross profit for LA for all three years

b$.$ Analyze the changes in gross profit margin for all three years