Please show me the calculations.

1.One store's information is listed in the table below:

Sales Returns$700

Rent Expense$1,288

Sales Discounts$950

Depreciation Expense$600

Cost of Merchandise Sold$7,600

Gross Sales$20,900

Advertising Expense$1,650

Salary Expense$2,900

Heat Expense$900

Using this information, calculate the store's:

(a)Net sales

(b)Gross profit

(c)Total operating expenses

(d)Net income