Performance Guarantee. The developer shall furnish a performance guarantee in favor of the Township in an amount not to exceed 120% of the cost of installation of only those improvements required by an approval or developer's agreement, ordinance or regulation to be dedicated to a public entity, and that have not yet been installed, which cost shall be determined by the Township Engineer, according to the method of calculation set forth in N.J.S.A. 40:55D-53.4, for the following improvements as shown on the approved plans or plat: streets, pavement, gutters, curbs, sidewalks, street lighting, street trees, surveyor's monuments as shown on the final map and required by the Map Filing Law, P.L. 1960, c. 141 (N.J.S.A. 46:23-9.9, et seq.), repealed by Section 2 of P.L. 2011, c.217, or N.J.S.A. 46:26B-1 through N.J.S.A. 46:26B-8, water mains, sanitary sewers, community septic systems, drainage structures, public improvements of open space, and any grading necessitated by the preceding improvements. The Township Engineer shall prepare an itemized cost estimate of the improvements to be covered by the performance guarantee, which itemized cost estimate shall be appended to each performance guarantee posted by the developer.