Straight Line & Accelerated Depreciation Method

I am not sure how they are performing the math for the NPV in this formula. I can see how the - 230,000 was obtained as it is the initial outlay and I can see how the 43,465 was obtained (70,000 / 1.61051 and rounded). However, I cannot get the 348,752 no matter which way I try to solve this problem. Please look at this and show me step by step how the 348,752 was obtained.