hi can you help me Calculate trend percentages for all income statement amounts and comment on the results.

Use Year $1$ as the base year. Comment on the results.

Year $3$ Year $2$ Year $1$

Sales $ $14,800$ $ $13,229$ $ $13,994$

Cost of goods sold $ $8,225$ $ $8,661$ $ $8,375$

Gross profit $ $6,575$ $ $4,568$ $ $5,619$

Operating expenses $ $3,664$ $ $3,576$ $ $3,487$

Operating income $ $2,911$ $ $992$ $ $2,132$