Can someone please help explain how to get the ATP for the first two days? I was able to calculate the others but the first two I keep getting wrong.

A forecast of 320 units in January, 320 units in February, and 240 units in March has been approved for the seismic-sensory product family manufactured at the Rockport facility of Maryland Automated, Inc. Three products, A, B, and C, comprise this family. The product mix ratio for products A, B, and C for the past 2 years has been 30 percent, 35 percent, and 35 percent, respectively. Management believes that the monthly forecast requirements are evenly spread over the 4 weeks of each month. Currently, 5 units of products C are on hand. The company produces product C in lots of 40, and the lead time is 2 weeks. A production quantity of 40 units from the previous period is scheduled to arrive in week 1. The company has accepted orders of 25, 15, 5, 15, 4, and 6 units of product C in weeks 1 through 6, respectively. Prepare a prospective MPS for product C and calculate the available-to-promise inventory quantities. Develop an MPS for product C. (Enter your responses as integers. A response of "0" is equivalent to being not applicable.) Item: C Order Policy: 40 units Lead Time: 2 weeks March January Quantity on Hand: 5 February Week 6 7 1 2 3 4 5 8 9 10 11 12 Forecast 28 28 28 28 28 28 28 28 21 21 21 21 25 15 5 15 4 6 0 0 0 0 0 0 Customer orders (booked) Projected on-hand inventory MPS quantity 17 29 1 13 25 37 9 21 0 19 38 17 40 40 0 40 40 40 0 40 0 40 40 0 MPS start 0 40 40 40 0 40 0 40 40 0 0 0 Available-to- promise (ATP) inventory 0 25 36 34 0 40 0 40 40 0