Answer:
C. $1,832 F
Explanation:
The spending variance for equipment and supplies can be calculated as below:
Spending variance = Actual spending - Standard Spending
                =  Actual cleaning equipment and supplies -  (Planned boat activity x Cost per boat activity + Fixed planned cleaning equipment and supplies per month)
                = 3,470 - (58 x 49 + 2,460) = - $1,832 (Favourable).