a. Accounts receivable at the beginning of the year are $280. The company has a 45-day collection period. Calculate cash collections in each of the four quarters by completing the following (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places, e.g., 32.16.) b. Recalculate the cash collections with a collection period of 60 days. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places, e.g., 32.16.) c. Recalculate the cash collections with a collection period of 30 days. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places, e.g., 32.16.)